Year	constant 2010 US$
1991	514.541048665428
1992	529.257101967254
1993	577.440081218895
1994	591.759093796774
1995	577.980815473084
1996	595.604784806633
1997	595.78044694646
1998	612.606680648938
1999	630.144875712086
2000	635.636717948135
2001	661.646794364212
2002	667.332825477219
2003	639.880027741924
2004	676.488757815011
2005	668.989023396086
2006	649.87356816442
2007	668.522232252651
2008	708.460947128563
2009	737.54372901789
2010	803.552566520503
2011	826.71241132035
2012	857.313663835362
2013	924.084638777273
2014	987.853614474164
2015	1019.58266639217
2016	1045.8952261935
2017	1051.53474885485
2018	1055.09336830001