Year	constant 2011 international $
1990	28905.5703241723
1991	27047.8399017226
1992	26002.0799527475
1993	25686.5100224016
1994	26583.533331846
1995	27596.4128931831
1996	28512.4344000172
1997	30205.0204371741
1998	31760.2768039513
1999	33094.8384299002
2000	34887.1787990067
2001	35706.1533300355
2002	36218.2401573648
2003	36852.4439237464
2004	38188.2510919027
2005	39115.7647931549
2006	40546.0807261049
2007	42467.2609961997
2008	42574.6411365042
2009	38867.7994464569
2010	39848.1344978775
2011	40683.5275821703
2012	39912.9413580065
2013	39428.3120606313
2014	39017.5372069548
2015	39083.9347589518
2016	40052.0286231029
2017	41174.2047642122
2018	41782.0709721009