Year	current US$
1990	873750000
1991	906416666.6666667
1992	863268750
1993	793181818.1818181
1994	644909090.9090909
1995	675730452.6748971
1996	846487288.6320148
1997	728140918.9111334
1998	593456863.8403605
1999	435692962.11354405
2000	468265111.9512461
2001	526790450.928382
2002	552418239.1076021
2003	645213748.3526139
2004	661347256.4048474
2005	700758934.8446635
2006	812847888.9445095
2007	1022138956.7554966
2008	1207146753.6808066
2009	879890102.8311788
2010	836532539.9227021
2011	1026679560.5339046
2012	1100033467.0234296
2013	1073692899.2138186
2014	1099204835.541051
2015	939002801.459735
2016	874424897.5592407
2017	963990300.7939922
2018	965675348.400472
2019	972166970.6361638
2020	1006487552.903919
2021	1148024058.6510372
2022	1334454781.6493812
2023	1350463597.723396