Home > Coal > The U.S. Coal Industry in the 1990's: Low Prices and Record Production > Figure 9-2

 

Figure 9-2. Correlations Between Average Coal Mine Size and Mine Productivity, 1986, 1991, 1994, and 1997
Figure 9-2. Correlations Between Average Coal Mine Size and Mine Productivity, 1986, 1991, 1994, and 1997
Sources: Energy Information Administration, Coal Production 1986, DOE/EIA-0118(86) (Washington, DC, January 1988) Tables 1 and 48; Coal Production 1991, DOE/EIA-0118(91) (Washington, DC, October, 1992), Tables 1 and 25; Coal Industry Annual 1994, DOE/EIA-0584(95) (Washington, DC, October, 1995), and Coal Industry Annual 1997, DOE/EIA-0118(97) (Washington, DC, December, 1998) (Tables 1 and 51).