Year	constant 2011 international $
1990	9498.77071590141
1991	9892.10132944243
1992	10656.3373040621
1993	10876.36802521
1994	11552.6050728194
1995	11335.6337494762
1996	11907.0014380701
1997	12923.2503021399
1998	13416.5661762563
1999	13177.4419017307
2000	12864.380958839
2001	12343.7844363626
2002	11492.5716025376
2003	11044.320013613
2004	11575.5767914494
2005	12638.0834585965
2006	13231.355356758
2007	14070.3686260696
2008	14918.8159986107
2009	15455.051767892
2010	16520.9511614421
2011	17381.935761536
2012	17191.7941404432
2013	18305.9709487414
2014	18632.4875637303
2015	19036.1921914963
2016	19195.5938485552
2017	19400.4688851236
2018	19434.8518584543