Year	constant 2011 international $
1990	20727.8646464327
1991	21025.3883084167
1992	21887.2777067148
1993	22190.5686889262
1994	23229.5219003872
1995	24111.3301062714
1996	24716.3226134147
1997	25054.3440168884
1998	25385.3140234977
1999	25535.111366793
2000	26788.9873181663
2001	26180.481677227
2002	25661.6900374221
2003	25438.4164848096
2004	26053.4231431936
2005	26608.7444730943
2006	27607.1700409329
2007	28684.9872970493
2008	28990.2472901177
2009	28635.1112466773
2010	29665.3153877937
2011	30568.9589573774
2012	30644.8523486874
2013	31324.9236701338
2014	31927.1609156763
2015	32104.4191193521
2016	32742.9202027499
2017	33220.4496281841
2018	33660.9872847233