Year	current US$
1987	1200000.047683716
1988	13509999.930858614
1989	40399999.61853031
1990	67580000.46573584
1991	78319999.28690484
1992	80090000.76539823
1993	50289999.12552529
1994	38080000.37446617
1995	108889998.6743927
1996	93300000.36396085
1997	138760000.41887164
1998	56749999.26239245
1999	97750002.66358253
2000	55529999.71993274
2001	68409999.29048128
2002	119899999.77685516
2003	146460001.56179076
2004	142149999.75636607
2005	377500005.74439734
2006	126580001.92046173
2007	415860001.2362004
2008	694089998.5618889
2009	969350001.1004505
2010	867970015.2818112
2011	536269996.5722858
2012	253679999.41669393
2013	157750000.3222376
2014	122040001.0868907
2015	74990000.33177426
2016	65900000.909343384
2017	97280000.2228469
2018	115069999.69482434
2019	112169998.29933052
2020	114490001.6076863
2021	165859997.10299087
2022	158769999.27870938