Year	constant 2011 international $
1990	31355.0530028365
1991	30321.870842077
1992	30234.9188959814
1993	30700.1752005497
1994	31730.6083194497
1995	32249.3621745285
1996	32430.6629914839
1997	33484.1374003772
1998	34501.9045662711
1999	35988.8036385375
2000	37501.7007504023
2001	37760.1897769466
2002	38478.6542298176
2003	38820.1188391719
2004	39646.9498927695
2005	40532.1796744085
2006	41181.8433755077
2007	41629.2206255974
2008	41595.7885827481
2009	39919.3036571117
2010	40697.5816614987
2011	41569.449617197
2012	41845.1810611483
2013	42370.1937247246
2014	43149.5764241678
2015	43124.2111021596
2016	43110.7012142278
2017	43871.4023502939
2018	44070.101421834