Year	constant 2011 international $
1990	20023.1359867147
1991	17739.9967006919
1992	17632.0996214391
1993	17624.68477675
1994	18130.891018021
1995	19270.6993868643
1996	20107.8534574349
1997	20009.8318097638
1998	19962.9612888893
1999	20269.6986562541
2000	21193.9017140583
2001	21892.48252523
2002	22297.2247461099
2003	23107.2038753806
2004	24233.5969865534
2005	25781.2047057911
2006	27473.6271233445
2007	28844.0671946539
2008	29373.1092319296
2009	27803.5871622193
2010	28352.9493964403
2011	28797.4179611691
2012	28527.1387345992
2013	28379.7461179156
2014	29119.6166119074
2015	30605.4205211471
2016	31295.2595242278
2017	32570.7811793014
2018	33435.5091806054