Year	current US$
1990	298483856.973484
1991	279804619.644778
1992	289034425.850791
1993	262447554.207195
1994	163497643.36002
1995	187045556.61341
1996	189581905.383098
1997	174075211.275487
1998	182773423.033771
1999	176888471.329411
2000	158548487.449564
2001	162808958.386855
2002	176989670.6953
2003	207229270.45146
2004	216875872.071554
2005	248249144.212223
2006	252653514.367005
2007	289417904.228
2008	316303543.79663
2009	302285228.702112
2010	280034364.766749
2011	297575098.208149
2012	281577464.543393
2013	290016702.739083
2014	295447532.380038
2015	263268239.656374
2016	284340153.640589
2017	308133574.374933
2018	336610448.27973
2019	327535489.563768
2020	341999608.036086
2021	364119923.898339