Year	current US$
1996	163149859.565217
1997	137186685.037648
1998	90770376.2044959
1999	64060605.3058976
2000	72786894.1103236
2001	86715485.5062168
2002	100724950.70069
2003	123331575.097568
2004	166611239.881851
2005	193538172.0594
2006	219821246.978547
2007	330541850.921342
2008	434186787.990762
2009	484371405.298121
2010	577500876.098361
2011	663594276.960089
2012	665397659.574971
2013	514612085.130617
2014	630295594.351537
2015	415740395.314529
2016	413255061.110082
2017	476394118.489536
2018	550660733.775131
2019	665610977.815353
2020	678880876.002503
2021	778749162.557257