Year	US Dollars adjusted for inflation)
1981	71198329.51374
1982	74638083.40906
1983	86212960.08923
1984	89545975.43881
1985	83942821.70514
1986	104544488.15575
1987	114333776.61882
1988	123239287.95713
1989	121154561.30245
1990	124396955.96483
1991	124506286.89341
1992	133397032.92075
1993	141409186.58903
1994	149720816.83178
1995	162017728.48978
1996	145325149.94131
1997	135957969.03241
1998	132091035.52954
1999	128924608.95568
2000	136519163.56169
2001	143841179.83233
2002	147603854.46001
2003	147854977.45885
2004	148030245.08148
2005	152345998.95301
2006	154534759.0583
2007	160180179.90353
2008	157545417.23701
2009	154968025.12992
2010	164969100
2011	166959486.46167
2012	172732723.05227
2013	177673015.7643
2014	176328132.63045
2015	175685334.39777
2016	179041793.90522
2017	183517838.75285