Year	constant 2015 US$
1996	19151.71018154628
1997	19317.10539644692
1998	19752.7930904615
1999	20309.00398946911
2000	21520.67867286315
2001	22219.95964953919
2002	23132.469967112072
2003	23435.509653812944
2004	24027.01443668068
2005	24830.86515310307
2006	25196.53483869679
2007	26155.797879297763
2008	26351.520728064777
2009	25633.49967152757
2010	25699.747163666285
2011	26200.72791015789
2012	26922.48490138229
2013	27035.299538934003
2014	26818.239650162996
2015	27210.733876299622
2016	27577.230514239174
2017	28649.73016234453
2018	29757.70827970606
2019	30755.623667586202
2020	30334.77537182121
2021	32547.547805945207
2022	33965.80148452715