Year	constant 2010 US$
1991	24354.0431490434
1992	24869.8547681602
1993	26712.7085315557
1994	27770.7355264291
1995	29404.3839639415
1996	30412.9406016599
1997	34533.6500294797
1998	36745.4705907763
1999	41116.4142158607
2000	44061.6535712686
2001	48553.1124520938
2002	52971.1194720691
2003	60711.3166554786
2004	69783.5441774251
2005	72566.8469936054
2006	68193.9407563173
2007	68045.9426736345
2008	73436.4935415393
2009	82608.7506451547
2010	81041.0856345072
2011	82064.3165963236
2012	92353.5256401995
2013	96200.5816845058
2014	104618.110645646
2015	82339.1307004025
2016	58437.3759346008
2017	42288.0088690247
2018	41663.9832094272