Year	constant 2021 US$
1991	295519989.013672
1992	393149993.89648396
1993	289100006.10351604
1994	174940002.44140598
1995	286869995.11718804
1996	110930000.30517599
1997	88059997.55859381
1998	63009998.3215332
1999	64589996.337890595
2000	60639999.3896484
2001	68800003.0517578
2002	65040000.9155273
2003	65610000.61035161
2004	64319999.694824204
2005	71209999.0844727
2006	90160003.6621094
2007	93260002.1362305
2008	111239997.86377
2009	105750000
2010	148039993.28613302
2011	118300003.05175799
2012	107830001.831055
2013	108989997.86377
2014	120180000.30517599
2015	120669998.168945
2016	-23569999.6948242
2017	-280019989.013672
2018	127089996.337891
2019	232339996.33789098
2020	346450012.207031
2021	139710006.71386698
2022	11680000.3051758