Year	current US$
1991	209999.993443489
1992	20350000.3814697
1993	104779998.77929701
1994	177320007.32421902
1995	209059997.55859402
1996	309369995.11718804
1997	242029998.779297
1998	208669998.168945
1999	246839996.33789098
2000	171949996.94824198
2001	294130004.88281304
2002	317209991.455078
2003	228669998.168945
2004	314209991.455078
2005	293339996.33789104
2006	357190002.441406
2007	311450012.207031
2008	705960021.972656
2009	638070007.324219
2010	588859985.351563
2011	545059997.558594
2012	659190002.441406
2013	646309997.558594
2014	563760009.765625
2015	448929992.675781
2016	462739990.234375
2017	447440002.441406
2018	589099975.585938
2019	492190002.441406
2020	1041010009.76563
2021	769179992.675781
2022	375910003.66210896