For most of its 105 years in print, Oil & Gas Journal has published multiple series of industry statistics.In formats that have varied through the years, the numbers have covered industry functions such as production, drilling activity, and refinery operations. Oil and gas prices, too, long have been part of the numerical picture OGJ presents of the industry it covers.Inevitably, the data series themselves have evolved. Sources change. New data series emerge, and some lose relevancy and expire.OGJ’s statistical offering now is more comprehensive than ever. It’s also complex. Some tables in the Statistics section appear every week, but some appear only once a month. While n...