Year	constant 2021 international $
1990	37619.556422700996
1991	37644.57761918621
1992	35849.48707366565
1993	34108.678361650025
1994	35934.10853407571
1995	37073.577831888375
1996	37573.33340663454
1997	38057.17719537349
1998	40936.54508142679
1999	41500.60336852244
2000	44368.720295298976
2001	44812.16948539252
2002	44173.928415557544
2003	46004.07810755219
2004	49055.217488005896
2005	51480.1326804102
2006	54494.3100375795
2007	55992.2393212235
2008	59684.355682956666
2009	60206.53803250689
2010	60625.16285493131
2011	60340.05263528685
2012	61267.46533267651
2013	60822.13562744889
2014	63919.1545760603
2015	62503.39715198749
2016	65345.93201086996
2017	65396.68278126311
2018	65979.16105599722
2019	67604.05070099857
2020	67560.25390277998
2021	68086.46012381752