Year	current US$
1990	6664679.44484138
1991	8197922.24583512
1992	8439442.90558297
1993	10095856.9203322
1994	10836327.4994318
1995	11465355.9188837
1996	11778803.7435655
1997	12748197.363161
1998	12839362.4044713
1999	14023295.9308625
2000	13178743.993175
2001	13196651.8227321
2002	13703878.2579738
2003	15759662.1598237
2004	16988075.2002389
2005	17682346.9157809
2006	19128554.5868686
2007	21375195.5196952
2008	25764229.5164972
2009	27065127.9716913
2010	25434635.4999747
2011	27740400.1844232
2012	29516545.742871
2013	31678878.9454678
2014	28620144.2161549
2015	32338721.8755659
2016	40220940.9687459
2017	44526342.5977769
2018	54066668.8007071
2019	59129437.069828
2020	62637181.1456422
2021	69765994.344334