Year	constant 2021 international $
1990	33705.770412474136
1991	31666.973625830935
1992	29816.65623126738
1993	29265.872289589977
1994	29588.501186283927
1995	30311.17989807046
1996	31034.11168679664
1997	30902.918219879
1998	31824.244623129693
1999	33578.89065841157
2000	34461.639134815596
2001	34871.76925088468
2002	35345.79686010021
2003	34435.98410340284
2004	34274.16159512747
2005	34957.72432725099
2006	35343.59791436566
2007	35353.26954111768
2008	34043.59224194212
2009	32155.737828907077
2010	32194.344406284188
2011	31990.82833464844
2012	32595.339629668677
2013	31367.375777489964
2014	31661.03046067575
2015	31686.241504546106
2016	31121.58511182869
2017	31748.776222378554
2018	32349.757326774816
2019	31701.579496450777
2020	24792.706524776295
2021	28510.90948890732
2022	31424.871446952293
2023	32047.9042744282