Year	constant 2010 US$
1991	49236.3710475869
1992	49304.696066997
1993	49164.5992351208
1994	50008.0594518841
1995	49394.055181131
1996	49952.8161610301
1997	50538.7517377783
1998	51646.4557101704
1999	52304.4634649988
2000	53185.8589175892
2001	53547.5429811974
2002	53494.5531353548
2003	53397.7212483461
2004	53684.3057157562
2005	54135.6771400849
2006	54898.8895726878
2007	55765.5131779326
2008	55640.1542774578
2009	54038.8793430634
2010	54290.0059753778
2011	55145.8265576719
2012	55303.6290048591
2013	55472.520533806
2014	55691.2650785884
2015	55784.8592567387
2016	55795.8886719623
2017	57267.3318420608
2018	58042.7144309428