Year	constant 2021 international $
1990	2422.3764591579907
1991	2191.993224515103
1992	2159.6144601621672
1993	2290.7805488751806
1994	2668.027373235198
1995	3103.8031151037326
1996	4593.481596498783
1997	6059.5006555782575
1998	6950.783680754048
1999	7543.034699017312
2000	7901.3327716571575
2001	8062.746223090604
2002	8461.081245125595
2003	8819.062682630167
2004	9469.45757352455
2005	9955.194934231939
2006	10587.810824916462
2007	11348.363632868937
2008	12161.824867871128
2009	11996.116456747128
2010	12311.610779477007
2011	12655.36836289782
2012	12786.267809545145
2013	13292.258290616839
2014	13620.677065377278
2015	14396.824585295046
2016	15048.657102951118
2017	15721.841684186213
2018	16515.14036913002
2019	17191.28933217118
2020	16885.50720064452
2021	18396.469092975207
2022	19395.927134886744
2023	19860.340804696603