Year	current US$
1970	18029999.82051549
1971	21909999.907016747
1972	41150000.27418142
1973	25199999.541044194
1974	71740002.26706271
1975	128600001.15633003
1976	88919998.64578244
1977	93170001.38759607
1978	102479999.7210503
1979	157759996.034205
1980	133350001.09672546
1981	104890000.99897385
1982	113399997.75215982
1983	95359999.15003766
1984	95709997.88865447
1985	93589999.55654147
1986	130960002.18391427
1987	114950000.28610227
1988	99489998.81744385
1989	260370001.7929081
1990	114079998.79680572
1991	123039998.71760607
1992	140739998.45795327
1993	120349997.34163298
1994	141450001.10007828
1995	121070000.26106842
1996	116700000.85234635
1997	88080001.26481044
1998	65470000.9524822
1999	65330000.94443555
2000	78570001.27434723
2001	93450000.10728838
2002	71339999.67575073
2003	112180002.74896617
2004	120970000.02861035
2005	146830001.23500818
2006	136399998.52329493
2007	101680001.49726863
2008	152090000.45061114
2009	169979999.9892712
2010	194299998.04496765
2011	197280004.3821338
2012	183409998.5454231
2013	206269997.23166186
2014	225860004.79012752
2015	166520000.1262131
2016	155360001.21198568
2017	183889997.03340203
2018	212529997.2854556
2019	199749994.19599745
2020	183289996.80280697
2021	194120003.43203494
2022	156789999.15719026