Year	constant 2011 international $
1990	10932.3934694604
1991	11902.2575675724
1992	12816.1710225505
1993	13774.4919345949
1994	14371.1822350641
1995	13741.6006003088
1996	14297.2184744681
1997	15263.4227063456
1998	15619.1638571807
1999	14902.5697364555
2000	14616.8908695128
2001	13791.0650301987
2002	11841.0326500408
2003	12909.8251086576
2004	12910.8966742979
2005	13885.7487280425
2006	16185.4316326944
2007	17585.6507875445
2008	18136.7691814672
2009	16790.8736988655
2010	18278.6705327858
2011	19251.0055434778
2012	18939.9887379153
2013	19227.7418081629
2014	18562.400384518
2015	18900.7976673507
2016	18249.0579877142
2017	18462.3352170971
2018	17611.2181311991