Year	constant 2011 international $
1990	22227.1844890834
1991	22579.0914562659
1992	23457.7153730005
1993	24341.3525584424
1994	25125.7963064436
1995	26027.2254325748
1996	26332.3432957974
1997	27361.9218033867
1998	28709.7391180892
1999	30105.9848363114
2000	31005.1757930207
2001	32892.166032201
2002	33150.8380086608
2003	33147.7934545078
2004	36040.4112393733
2005	35375.2997331923
2006	35024.7199035189
2007	34820.7718567863
2008	34379.7377220845
2009	33892.8481363725
2010	33924.0641516911
2011	34195.6510701376
2012	34622.060371829
2013	34913.6331753494
2014	35066.0568593182
2015	35314.5413489212
2016	35550.9548678774
2017	35454.4062661604
2018	35085.2973139475