Year	constant 2011 international $
1990	20506.6677222797
1991	20416.0890423109
1992	19839.8931376738
1993	19440.3208382858
1994	19219.9501172439
1995	19468.4848982782
1996	19718.7007969989
1997	20263.4862183038
1998	20595.5350187479
1999	21175.383267033
2000	22175.0430407597
2001	22685.9421094976
2002	23109.1340518721
2003	23628.08934296
2004	24532.6699318532
2005	25284.8084963659
2006	26327.5059381718
2007	27280.604011222
2008	27497.295290688
2009	26240.5662542815
2010	26938.8884651939
2011	27611.5726625318
2012	27701.5526403078
2013	27886.3121964737
2014	28244.1000832869
2015	28581.9498483895
2016	28982.0085172874
2017	29742.9472882695