Production Rises from Marcellus Gas Wells from the Pittsburgh Post-Gazette 
"Production from the commonwealth's Marcellus Shale gas wells increased again during the final six months of 2011, boosting their output by more than 40 percent over the previous reporting period. The new data, released by the Department of Environmental Protection today, shows more than 2,200 producing wells, an increase of more than 500 since the first half of 2011."