Year	current US$
1990	270343633.480747
1991	289873406.911326
1992	326593044.504941
1993	335967683.071056
1994	354816507.17734
1995	371936146.008588
1996	404458652.870269
1997	458438422.059645
1998	465298493.538039
1999	507856324.78731
2000	546639451.547895
2001	613644309.757042
2002	635618129.78893
2003	701830320.247264
2004	724530397.386157
2005	796403597.931502
2006	840430254.478521
2007	856810577.138094
2008	917045515.709019
2009	860836759.71772
2010	887354410.744758
2011	903501871.527875
2012	997659277.591668
2013	1030856541.40172
2014	1076454076.79284
2015	1122466553.37504
2016	1120081397.28082
2017	1232144878.00778
2018	1267824232.92465
2019	1386891027.14892
2020	1385214107.67487
2021	1498854047.29806