Year	constant 2011 international $
1990	30353.5197415143
1991	29439.3598978645
1992	29280.2773767403
1993	29789.6514715452
1994	30736.2931913874
1995	31270.4956275717
1996	31478.3140277374
1997	32575.6494265394
1998	33496.0745370565
1999	34932.9861409131
2000	36648.5036782275
2001	36835.6654197411
2002	37652.0599598844
2003	37995.9004194255
2004	38909.6239502447
2005	39812.4828270428
2006	40634.3414368078
2007	41119.8512225183
2008	41079.1723345739
2009	39341.9260304955
2010	39994.0240324641
2011	40879.6951554988
2012	41202.8656337067
2013	41826.0715017358
2014	42558.2254833216
2015	42585.0882569504
2016	42712.6938506806
2017	43515.1589784856
2018	43621.3370792534