Year	Tons of Coal
1983	24380836
1984	26981315
1985	24677426
1986	28147617
1987	31770968
1988	29344413
1989	30732684
1990	35150851
1991	30590663
1992	32292037
1993	35078306
1994	36477034
1995	36911840
1996	38420790
1997	39572074
1998	36983592
1999	35601800
2000	32255620
2001	33846129
2002	32153835
2003	37521767
2004	37066754
2005	39615535
2006	41895942
2007	41251828
2008	41395834
2009	41002969
2010	40215953
2011	41051944
2012	38992526
2013	38709967
2014	38062875