Year	constant 2011 international $
1990	13156.4376489615
1991	13534.7087649621
1992	13774.9493098817
1993	13835.8510826152
1994	14260.2988275721
1995	12963.1579743867
1996	13671.3964312335
1997	14501.9715557817
1998	15020.9139518107
1999	15263.6693637576
2000	15789.7339515265
2001	15553.9650423784
2002	15355.9118864397
2003	15362.3283573539
2004	15780.5922876027
2005	15813.6956523263
2006	16386.012584077
2007	16488.1378069908
2008	16476.4915833118
2009	15334.2581647879
2010	15970.4650155622
2011	16257.9208253244
2012	16567.6502943344
2013	16411.3277008692
2014	16756.7134558461
2015	17074.1875721128
2016	17343.7531404559
2017	17532.5800133167
2018	17628.1172857209