Year	constant 2021 international $
1990	15235.946888060971
1991	15137.977412749866
1992	14994.815199191524
1993	15334.66524330123
1994	15562.466542815515
1995	16186.221647606888
1996	16611.257748121407
1997	17115.759237716175
1998	17594.536017339884
1999	17700.37300461782
2000	18662.292415142325
2001	19005.576115699383
2002	19421.81357696095
2003	20060.32809862379
2004	20686.844658976737
2005	21327.587099438588
2006	22315.830614680126
2007	23312.321968382803
2008	23424.091611161362
2009	22381.461875753368
2010	22818.32127330907
2011	23356.900574335777
2012	23555.633292060334
2013	23695.94156830858
2014	23960.28864915917
2015	24376.952970292667
2016	24908.528943356145
2017	25683.180114180002
2018	26299.36051796445
2019	27112.905464832533
2020	25438.792058692186
2021	26843.73423140241
2022	27597.100572627343
2023	27942.778896775908