Year	current US$
1970	22782897.4893427
1971	19210075.5060725
1972	21575903.4744418
1973	36090985.6517045
1974	39092601.9706656
1975	52642844.7701811
1976	47183575.1943657
1977	85970345.8861017
1978	89567187.9954806
1979	81480065.3432274
1980	95943870.2988154
1981	82103706.140459
1982	112323476.968166
1983	73005850.6605384
1984	65111605.6187842
1985	47693729.6542751
1986	76474708.8238213
1987	72611755.0827601
1988	79247934.5212034
1989	79379241.7826679
1990	94504866.82451
1991	90877420.4515249
1992	91234817.8088233
1993	72789336.9863773
1994	85340233.9226078
1995	133918664.088024
1996	132806941.651482
1997	132829675.437911
1998	141469808.353846
1999	87013513.7912737
2000	88232121.1594145
2001	85052539.4657184
2002	102374690.201375
2003	173505023.280595
2004	157664119.080133
2005	162197794.839084
2006	154491476.755636
2007	227024709.054115
2008	256868700.914822
2009	260559846.059713
2010	218638784.169349
2011	250356524.495934
2012	291249675.337378
2013	303542722.420345
2014	341180542.358183
2015	364323058.451231
2016	384792910.03303
2017	370303341.578658
2018	279304884.130827
2019	271320858.31131
2020	298232917.183692
2021	318893050.362317