Year	US Dollars adjusted for inflation)
1977	374028460.39483
1978	412510621.21769
1979	428271945.37647
1980	419447547.48192
1981	445581154.70837
1982	455004231.80344
1983	477475903.06429
1984	511585214.79332
1985	553790399.98927
1986	632307568.59649
1987	658526516.17313
1988	747975459.636
1989	816307139.21692
1990	897276348.79465
1991	902460605.2621
1992	972667197.73216
1993	978596842.0306
1994	995826370.51175
1995	1012659535.57662
1996	1042473517.54127
1997	1036927446.63035
1998	1102252837.22622
1999	1132229817.69697
2000	1132686052.04524
2001	1095125986.74705
2002	1098845760.52761
2003	1146378903.86855
2004	1229480777.2653
2005	1225024025.88053
2006	1301248475.60489
2007	1314070798.12831
2008	1388372579.34279
2009	1404755586.38534
2010	1381968259.25926
2011	1390680988.32147
2012	1393204448.24889
2013	1440498320.32084
2014	1437394252.57609
2015	1465619041.59808
2016	1489854701.38327
2017	1529936441.95369