Alan H. Shaw
Executive Vice President and Chief Marketing Officer at Norfolk Southern
Thank you Cindy, and good morning everyone. You can see on Slide 11 that we are approaching pre-pandemic revenue levels; however, the composition of our business has changed dramatically due to the secular trends in the overall economy that were accelerated by the pandemic. Norfolk Southern is positioned at the forefront of these shifts due to the unique advantages of our powerful consumer oriented franchise and the diverse industrial markets we serve. The progress we have delivered amid dynamic business conditions underscores the value we provide to the markets we serve.
Norfolk Southern's network directly connects to the majority of consumption and manufacturing in the United States and is a vital resource for maintaining the flow of goods to support the economy. We are building on the inherent value of our network by working to provide our customers with the digital logistics solutions they need to compete and grow in an evolving market. The sustainability advantages of the Norfolk Southern franchise deliver a competitive advantage, provide customers with solutions to their carbon offset goals and are an accelerant to growth.
In the second quarter of 2021, we successfully capitalized on opportunities by leveraging productivity enhancements and collaborating with our customers. As a result, second quarter revenue in our non-energy markets exceeded pre-pandemic levels by 4%. Growth this quarter was driven by consumer facing and industrial segments, which helped to offset sustained headwinds in our energy markets. Revenue in our energy related markets returned to just over two-thirds of pre-pandemic levels in the second quarter of 2021. Our market position enabled a quick recovery and consumer and industrial markets almost fully offsetting the 50% decline in our energy revenue, despite the sharp decrease in this historically profitable segment, we reduced operating ratio, levering the strength of our unique franchise to target segments of the $800 billion truck and logistics markets with a sharp focus on productivity.
Turning to Slide 12, our quarterly volume and revenue improved significantly from pandemic lows in all three business units, reflecting our ability to capitalize and build on the momentum of improving economic conditions. Total revenue for the quarter was $2.8 billion, up 34% year-over-year on 25% volume improvement. Rising fuel prices and price gains drove a 7% improvement in revenue per unit, led by our intermodal franchise, which delivered record-breaking revenue per unit and revenue per unit less fuel.
Sequentially, volume and revenue improvement in all three business units over the first quarter, in line with the accelerating economic recovery. Beginning with our merchandise segment, both volume and revenue improved 25% versus the second quarter of 2020 driven primarily by recovery from COVID-19 related shutdowns in the prior period. While automotive continued to face headwinds associated with the semiconductor chip shortage, shipments in the second quarter were up 122% year-over-year against easy comps associated with near complete shutdown of vehicle production in the second quarter of last year.
Our steel franchise also delivered strong growth this quarter, up 67% as record level steel prices and elevated demand fuel production activity. Combined gains in automotive and steel volume represented roughly 63% of total merchandise growth for the quarter. Revenue per unit was flat, while revenue per unit, excluding fuel declined slightly driven by mix headwinds in chemicals and automotive. Turning to intermodal, our powerful franchise delivered record-breaking revenue, revenue per unit and revenue per unit less fuel for the quarter. The second quarter of 2021 marks the 18th consecutive quarter of year-over-year growth in revenue per unit, excluding fuel for our intermodal franchise. Strong consumer demand and tightness in the trucking sector drove growth for our domestic service product. Domestic shipments were up 17% year-over-year in the second quarter and up 4% from the same period in 2019. International shipments were also strong in the second quarter improving 26% year-over-year on sustained high import demand but were down 3% from the same period in 2019. Revenue per unit gains were driven by increased statutory [Phonetic] revenue, higher fuel surcharge revenue and price gains.
Approximately 50% of the revenue per unit gain was driven by higher container storage time on terminal due to supply chain recovery challenges. Lastly, our coal segment experienced some bright spots in the second quarter due to higher demand levels driven by global economic recovery and weather events. Coal shipments improved 55% year-over-year with strength in both the export and utility markets. Revenue per unit decreased slightly due primarily to negative mix experienced in our export markets where growth was driven by strength in the lower RPU export thermal market.
Moving to our outlook on Slide 13. We expect the current economic momentum to continue through the end of the year and are raising our guidance for full-year revenue growth to approximately 12% year-over-year. The overall economy continues to surprise to the upside with forecast for 2021 GDP growth now at around 7% and approximately 5% for 2022. Industrial production is forecasted to increase 6% in 2021 and north of 3% in 2022. Increased manufacturing coupled with record low retail inventories, high savings rates and increased energy consumption, all set the stage for continued growth in the second half of the year.
Merchandise growth will be led by strength in steel markets as low business inventory to sales ratios and sustained demand for durable goods drives manufacturing activity in the second half. We are well positioned to capture opportunities associated with current strength in the steel markets as our network serves more integrated steel mills than any other railroad in North America. Merchandise energy markets will benefit from increased travel and commuting activities as businesses continue to reopen and virus restrictions are lifted. Pulp board and plastics volumes are also expected to increase as personal consumption drives demand for packaging.
Merchandise gains will be partially offset by a year-over-year decline in automotive shipments in the third quarter, due to planned production downtime associated with the semiconductor shortage. Demand for international trade to support recovering global economies is expected to lead second half growth in our intermodal franchise. Domestic intermodal demand will continue to improve as well with consumer spending and e-commerce forecasts strengthening through the end of the year and ongoing capacity constraints in the trucking sector, driving more opportunity for highway to rail conversions. Our coal franchise will continue to capitalize on near-term opportunities to support global energy demand and steel production.
Volume in the second half of 2021 is expected to improve year-over-year, driven by export markets benefiting from high seaborne coal prices making US coals more competitive in the global market. Demand for domestic met to support growing steel production activity is also likely to produce year-over-year growth. Gains in these markets will be partially offset by expected year-over-year declines in utility volume as this market deals of unit retirements, coal supply and planned maintenance outages.
Volatility is an ever-present risk in the coal market, so we are closely monitoring geopolitical trade tensions and coal production, both of which have a potential to influence results. Overall, we expect economic conditions to be favorable for Norfolk Southern growth through the end of 2021. We are confident in our ability to leverage the strengths of our unique franchise and continue to drive revenue and margin growth.
I will now turn it over to Mark, who will cover our financial results.