Year	constant 2021 international $
1990	16405.537573969774
1991	17856.909776920118
1992	19221.273283366052
1993	20647.8112007597
1994	21524.649426834454
1995	20563.51381752757
1996	21380.677130512013
1997	22816.730766696804
1998	23342.46513531076
1999	22262.918247610753
2000	21829.005388132176
2001	20594.24854686803
2002	17684.02857984692
2003	19287.86301937657
2004	19297.19148564935
2005	20754.83020324062
2006	24187.481663716517
2007	26278.012057636155
2008	27101.622237067844
2009	25086.764042772193
2010	27445.60411046481
2011	28905.574720380326
2012	28438.579918878855
2013	28870.643992325622
2014	27871.627281624656
2015	28379.734139835433
2016	27396.492860469476
2017	27761.53298508232
2018	26467.489009311204
2019	25601.253811420163
2020	23151.58353597813
2021	25560.640223108527
2022	26607.296606934928
2023	25876.053071825314