Year	constant 2011 international $
1990	31141.9028555525
1991	31599.1206761956
1992	31841.1091489015
1993	31550.2719115402
1994	32222.360688622
1995	33152.0409902736
1996	33569.0629900554
1997	34167.0952615886
1998	34709.2728108162
1999	35244.7565357214
2000	36535.8187670132
2001	37162.42333617
2002	37199.3523731905
2003	37090.4052236178
2004	37434.1000868702
2005	37604.360624075
2006	38243.8063277255
2007	38612.0116543642
2008	37954.1606640052
2009	35710.4200015019
2010	36201.1615672134
2011	36347.3424784176
2012	35227.6248251817
2013	34219.8327781897
2014	33945.8438783585
2015	34292.5348236811
2016	34735.1936740806
2017	35373.1686897052
2018	35739.0027770469