Year	constant 2011 international $
1990	21190474.149738
1991	21955273.3228973
1992	22567576.6039537
1993	23495259.9475801
1994	25911391.9523545
1995	24614672.5841218
1996	23147303.0509166
1997	25462779.6983373
1998	29409821.1913598
1999	28949912.945335
2000	28668925.1441452
2001	29137406.2412473
2002	31435232.9011561
2003	30387327.9283056
2004	29976436.2190281
2005	28843407.8778345
2006	29460350.5841796
2007	31331249.260443
2008	33832504.6335606
2009	32332759.980405
2010	31450260.6048091
2011	33814047.7894767
2012	32517025.8500295
2013	34005272.7970345
2014	34463668.1869869
2015	37614644.8146861
2016	38756145.1498855
2017	40342828.5986712
2018	41351399.313638