Year	current US$
1990	26295189.8096469
1991	27924172.6498759
1992	29203151.6415411
1993	30988671.9360197
1994	30165992.7686884
1995	32561610.8096298
1996	35495584.2542582
1997	39734641.1319302
1998	45365747.1624652
1999	46152619.5192942
2000	52529359.8601203
2001	65789190.7045026
2002	72751468.4607828
2003	85732560.5462852
2004	109209053.355795
2005	114702589.93857
2006	117223715.759435
2007	130053907.978271
2008	127747647.017352
2009	138915915.027027
2010	143462777.277525
2011	153914472.707411
2012	151932533.213613
2013	169385015.502825
2014	198320753.980724
2015	226371059.346826
2016	275082500.331848
2017	284744081.362019
2018	296191314.820272
2019	309104216.371613
2020	312331739.996725
2021	337180459.577404