Year	constant 2011 international $
1990	11893.7405585113
1991	11962.3827239539
1992	12297.8874493728
1993	12322.0904351078
1994	12299.2405204926
1995	12290.1007113739
1996	12611.8808812858
1997	12772.359725676
1998	13153.8072055301
1999	13166.6841035146
2000	13627.7862914264
2001	13563.1881725164
2002	13551.1259108902
2003	13983.1430401595
2004	14816.0360106448
2005	15246.8978892351
2006	15797.2403458546
2007	16270.5851534157
2008	16641.1006805781
2009	16432.0754095905
2010	16907.0953419909
2011	17078.3601741104
2012	17347.2536154319
2013	17428.6550759061
2014	17578.4002421555
2015	17653.1850366954
2016	18238.3147778481
2017	18225.1253323124
2018	18363.8770894508