Coal has become a major issue in this year’s election, but here’s an energy-related issue that isn’t getting any campaign attention: Coal exports are booming.

U.S. 2012 coal exports, supported by rising steam coal exports, are expected to break their previous record level of almost 113 million tons, set in 1981, according to the U.S. Energy Administration’s short-term energy outlook and U.S. Census data recently released.

Exports for the first half of 2012 reached almost 67 million tons, surpassing most annual export volumes dating back to 1949, according to the report.

U.S. coal exports averaged 56 million tons per year in the decade preceding 2011. If exports continue at their current pace, the United States will export 133 million tons this year, although EIA forecasts exports of 125 million tons.

Total U.S. coal exports, including both steam and metallurgical (met) coal, were almost 13 million tons in June 2012, surpassing April’s record-setting amount by 0.2 million tons, the U.S. Energy Information Administration said.

It reported that June was also the third consecutive month of exports surpassing 12 million tons.

“The global economy has been slowing, especially in China, the world’s largest coal consumer by a large margin,” the report said. “As a result, EIA does not expect coal exports to continue at their current pace. Exports in August, the latest data available, reflect some of the weakening global demand for coal, falling 2 million tons from the record June levels. While declines in export levels inject some uncertainty, exports remain elevated with lower August exports still 13 percent above August 2011 levels. As a result, 2012 is still expected to surpass the 1981 record.”

This increase in exports marks a significant reversal from the general downward trajectory of U.S. coal exports beginning in the early 1990s, which bottomed out in 2002 just under 40 million tons, the lowest level since 1961.

Coal exports in 2011 rose a whopping 171 percent from 2002, with only a brief interruption by the global recession.

Export growth accelerated after the recession, with consecutive post-2009 growth of more than 20 million tons per year, a level of growth not seen since the 1979-to-1981 export boom, according to the EIA’s report. Current data for 2012 (through August) show coal exports are growing even faster and should more than double 2009 export levels, buoyed by growth in U.S. steam coal.

Increases in steam coal exports come after years of losing ground to met coal exports, the report added.

“While met coal has typically held a larger market share of U.S. exports than steam (its share remained relatively close to 55 percent over a prolonged period), between 2009 and 2011 met coal averaged two-thirds of U.S. coal exports,” the report said. “However, current data (through August 2012) show that steam coal exports are rebounding, growing about 50 percent in 2011 and on track to grow another 50 percent in 2012. In a near mirror image of 2010, steam exports are now driving U.S. coal export growth, accounting for 95 percent of the annualized 2012 export increase—pushing coal exports to likely reach their highest level on record this year.”