The average output of a mine in 1850 was about 8,500 short tons; its employment about 64. By 1900, the average mine's output had risen to 280,000 and the employment to about 1,400. Total Ruhr coal output rose from 2.0 million short tons in 1850 to 22 in 1880, 60 in 1900, and 114 in 1913, on the verge of war. In 1932 output was down to 73 million short tons, growing to 130 in 1940. Output peaked in 1957 (at 123 million), declining to 78 million short tons in 1974. At the end of 2010 five coal mines were producing in Germany. The last hard coal mine in Germany closed on December 21, 2018.