Jessica Fischer
Chief Financial Officer at Charter Communications
Thanks, Tom. Now let's turn to our customer results on Slide 5. Including residential and SMB, we lost 21,000 Internet customers in the second quarter. As part of the EBB to ACP transition, a small portion of subsidized Internet customers either did not opt to continue their service after the EBB program ended or did not meet the ACP requirements, particularly the requirement that customers use their service in each 30-day period, which covers the vast majority of the impacted subscribers. This resulted in 59,000 customer disconnects during the quarter.
Excluding that headwind, we organically grew 38,000 Internet customers in the quarter. Looking forward, we expect that 0 usage ACP customers will have a smaller impact in our quarterly results than what we saw this quarter.
Looking at the broader marketplace, while we saw seasonal increases in moves typical of the second quarter, moves remained well below pre-COVID levels. And voluntary churn, when excluding the EBB-ACP impact I mentioned, was even lower than last year, all of which reduced our selling opportunities.
Turning to video. Video customers declined by 226,000 in the second quarter, following a programming pass-through increase. Wireline voice declined by 266,000, and we added 344,000 mobile lines. Despite the lower number of selling opportunities from our reduced activity levels, we continue to drive mobile growth with our high-quality, attractively priced service.
Moving to financial results, starting on Slide 6. Over the last year, we grew total residential customers by $282,000 or 1%. Residential revenue per customer relationship increased by 2.8% year-over-year driven by promotional rate step-ups and earlier video rate adjustments versus last year that pass-through program rate increases. These effects were partly offset by the same bundle and mix trends we've seen over the past year, including a higher mix of non-video customers and a higher mix of lower-priced video packages within our base. Also keep in mind that our residential ARPU does not reflect any mobile revenue.
As Slide 6 shows, residential revenue grew by 4.5% year-over-year.
Turning to commercial. SMB revenue grew by 3.7% year-over-year, reflecting SMB customer growth of 3.7%. Enterprise revenue was up by 4.9% year-over-year. Excluding all wholesale revenue, enterprise revenue grew by 8.2%, and enterprise PSUs grew by 4.7% year-over-year.
Second quarter advertising revenue grew by 12% year-over-year. That growth came primarily from political. It was slightly offset by a 1% decline in our core advertising business due to lower local and national advertising revenue, including auto, partly offset by our growing advanced advertising capabilities.
Mobile revenue totaled $726 million with $299 million of that revenue being device revenue. Other revenue increased by 8% -- 8. 8% year-over-year and includes rural construction initiatives subsidies totaling $29 million. In total, consolidated second quarter revenue was up 6.2% year-over-year.
Moving to operating expenses and EBITDA on Slide 7. In 2Q, total operating expenses grew by $307 million or 3.9% year-over-year. Programming costs declined by 0.2% year-over-year due to a decline in video customers of 3.2% year-over-year and a higher mix of lighter video packages, all of which was mostly offset by higher programming rates. Looking at the full year 2022, we continue to expect programming cost per video customer to grow in the low to mid-single-digit percentage range.
Regulatory connectivity and produced content declined by 10.3% primarily driven by lower Lakers RFM costs and lower video CPE sold to customers. The decline in Lakers RF 10 cost was primarily driven by the delayed start of the NBA season in 2020, which drove more Lakers games charges in 2Q '21, making for an easier comparison this year. Excluding the RSN costs from both years, regulatory connectivity and produced content declined by 4.7%.
For the full year 2022, we continue to expect regulatory connectivity and produced content expense to decline in the mid-single-digit percentage range versus 2021 primarily due to lower video CPE sold to customers and lower RSN costs given an abnormal Lakers game schedule last year.
Cost-to-service customers increased by 5.1% year-over-year. The increase was primarily driven by higher bad debt year-over-year given lower bad debt in the second quarter of 2021, which benefited from government stimulus packages at the time. And while this quarter's non-paid churn and bad debt write-offs both remain well below pre-COVID levels, our bad debt accrual includes expectations for potential softening of consumer finances later this year. Excluding bad debt from both years, cost to service customers grew by 1.1% primarily due to a larger customer base and higher fuel costs partly offset by productivity improvements.
As the year progresses, prior year bad debt expense normalizes and should drive slower growth in cost-to-service customers expense during the second half of the year.
Marketing expenses grew by 8.6% year-over-year due to higher labor costs driven by previously planned wage increases and higher staffing levels as Charter completes the insourcing of its inbound sales and retention call centers with a focus on providing better service to new and existing customers. For the full year 2022, we continue to expect marketing expense to grow in the mid-single-digit percentage range versus 2021.
Mobile expenses totaled $797 million and were comprised of mobile device costs tied to device revenue. Customer acquisition and service and operating costs and other expenses increased by 1.3%. Adjusted EBITDA grew by 9.7% year-over-year in the quarter.
Just a quick note on inflation before moving on to net income. We've seen some inflationary pressure in fuel, freight and utilities as well as pricing pressure on CPE and other network components. In labor, our planned move to a $20 per hour starting wage blunted the impact, but we still see pressure in the labor market, which we may need to more fully respond to as the year progresses.
I would also note that our consumers are experiencing inflationary pressure. But given the availability of subsidies for broadband and our focus on saving customers hundreds of dollars per year by switching to our converged connectivity product, we believe that we're well positioned for this environment.
Turning to net income on Slide 8. We generated $1.5 billion of net income attributable to Charter shareholders in the second quarter versus $1 billion last year. The year-over-year increase was primarily driven by higher adjusted EBITDA.
Turning to Slide 9. Capital expenditures totaled $2.2 billion in the second quarter above last year's second quarter spend of $1.9 billion. We spent a total of $357 million on our rural construction initiative in the quarter. Most of that then relates to design, walk out and make ready, and as expected, has not yet resulted in significant passings growth. And the vast majority of that spend is accounted for in line extensions.
We spent $95 million on mobile-related CapEx, which is mostly accounted for in support capital and scalable infrastructure and was driven by investments in back-office systems and wireless offload construction.
As Slide 10 shows, we generated $1.7 billion of consolidated free cash flow this quarter versus $2.1 billion in the second quarter of last year. The decline was
Primarily driven by higher cash tax payments and higher CapEx mostly driven by our rural construction initiatives.
We finished the quarter with $95.7 billion in debt principal. Our current run rate annualized cash interest is $4.5 billion. As of the end of the second quarter, our ratio of net debt to last 12-month adjusted EBITDA was 4.45 times leverage range. We intend to stay at or just below the high end of our 4 to 4.5 times leverage range.
During the quarter, we repurchased 8.3 million Charter shares and Charter Holdings common units totaling about $4.3 billion at an average price of $511 per share. And given where the share price has been, during the first two quarters of this year, we repurchased 7.2% of our fully diluted shares outstanding as of December 31, 2021, for approximately $7.8 billion.
Operator, we're now ready for Q&A.