Year	US Dollars adjusted for inflation)
1975	56806673982.3009
1976	66195031477.19528
1977	80386802831.8584
1978	79108971545.2688
1979	95661395017.01826
1980	118500337753.57397
1981	124021477848.877
1982	115688082614.02298
1983	110197733641.93298
1984	114624322913.54704
1985	110504178543.22702
1986	93974812607.21581
1987	97153023580.66707
1988	94608675561.60651
1989	106281391095.98401
1990	125760629081.00699
1991	126842273546.62996
1992	131085077658.27101
1993	132738310796.46001
1994	141892141892.444
1995	151381727243.02206
1996	160159451463.58096
1997	173277148999.31903
1998	173783108481.95999
1999	178826665568.41394
2000	198234194635.80701
2001	201007659577.94403
2002	205899094159.29199
2003	224019327978.216
2004	245449995044.24802
2005	257366938869.98001
2006	282684947637.84894
2007	291686739332.87897
2008	300996902491.49109
2009	285215869952.349
2010	289787338325.39093
2011	309870388019.06104
2012	323766916269.57104
2013	340127978216.474
2014	355089176310.41498
2015	373073383253.91406
2016	384222464261.40204
2017	387259360108.91803