Year	constant 2021 international $
1990	32133.28464425964
1991	30157.574707231426
1992	29124.260575332337
1993	28241.07419175537
1994	28542.435820048744
1995	33402.462014317585
1996	36415.26641257574
1997	30049.590451743687
1998	30745.153640250504
1999	32889.38943717641
2000	33714.850529099196
2001	33897.45044334752
2002	34419.51012877825
2003	33686.10279645845
2004	33614.33490390001
2005	34160.69999971993
2006	34460.45940906137
2007	34433.12173596938
2008	33709.670251560536
2009	31589.78190546142
2010	31385.50388878136
2011	31201.213912487536
2012	31735.028560431612
2013	30466.172472308645
2014	30394.843847173946
2015	30301.789528200406
2016	29583.75171155884
2017	30262.860912050033
2018	30155.63431463665
2019	30118.029757301065
2020	23454.160926640623
2021	27241.1108355096
2022	29827.373581282154