Year	current US$
1970	13848404.23565
1971	15039520.90825
1972	16454808.4153
1973	18054116.7566
1974	23240158.4491
1975	30306558.4843
1976	31464216.8234
1977	40196841.8669
1978	46714525.2327
1979	49364425.2459
1980	52226500
1981	65436333.3333333
1982	72184166.6666665
1983	73373999.9999997
1984	77606500.0000011
1985	83226000.0000009
1986	89738500
1987	92720000.0000006
1988	102617000
1989	44836600
1990	25148500
1991	26766000
1992	24220000
1993	14512647.5012941
1994	20668411.5270075
1995	23725324.6425792
1996	29422270.6850848
1997	30996457.82161
1998	37274996.5061225
1999	29261787.7371279
2000	30991207.1446879
2001	25069862.4765165
2002	36178085.7103148
2003	42197790.0580503
2004	48937520.630578
2005	60386571.6932289
2006	88595574.6169845
2007	101070203.580329
2008	122405678.316371
2009	133664618.666833
2010	146888715.958694
2011	143308281.869873
2012	164919129.419219
2013	172738661.924154
2014	178104808.85206
2015	176128636.881292
2016	108547631.41418
2017	110151367.67832
2018	124312557.814452
2019	124150052.971125
2020	84261418.8682818
2021	89275241.6953032