Year	constant 2011 international $
1990	30066.3493367545
1991	29653.4160969866
1992	28295.1320598375
1993	28376.7640655769
1994	29147.0855207052
1995	29023.1969094743
1996	30187.0506362677
1997	31015.3252877267
1998	32862.2371317681
1999	33779.9148800309
2000	34950.4607335363
2001	35833.5987031852
2002	35757.0922365035
2003	36315.7536610435
2004	38893.3787996132
2005	40705.8747920798
2006	41848.4716978287
2007	44624.2798957954
2008	44674.65712484
2009	41505.0848352344
2010	40136.7371548952
2011	40767.2364144887
2012	41076.606123176
2013	42371.9599617624
2014	42774.8888514713
2015	44222.826862679
2016	46819.4337044874
2017	47839.5190317436
2018	48605.5770683943