Year	constant 2021 international $
1990	13930.65483848556
1991	12920.677076538124
1992	11894.922670551505
1993	11076.531333030232
1994	9536.001006545805
1995	9261.837276947907
1996	9314.06007871941
1997	9668.370842427474
1998	9802.079488677397
1999	9691.923702261634
2000	10300.311392458012
2001	10455.115788053095
2002	11068.512562671529
2003	11815.94078507056
2004	12935.003118513707
2005	13846.370808571473
2006	14928.814547938156
2007	15988.554023631656
2008	16383.204633268599
2009	15427.931354927867
2010	16264.212994420785
2011	17336.377299453266
2012	17754.929230150196
2013	18552.090344576714
2014	18656.37711412339
2015	18794.497395526258
2016	19081.37161421299
2017	19899.70542073888
2018	20418.934432326387
2019	20726.722972414387
2020	20468.796968898838
2021	21984.619686338126
2022	22306.13600813639
2023	23270.078060110238