Year	constant 2010 US$
1991	803.608125799722
1992	841.402757024002
1993	854.097938523026
1994	876.866476886527
1995	858.102961544212
1996	929.307422734223
1997	891.753766668828
1998	935.067639213165
1999	952.159709093784
2000	936.403595179805
2001	978.390407423009
2002	901.229522995728
2003	971.427327783456
2004	963.93438858341
2005	999.811300238758
2006	1037.71495664252
2007	1106.86019315089
2008	1113.61405452821
2009	1121.71686210844
2010	1239.99076564037
2011	1374.91732884021
2012	1453.29729887811
2013	1520.49782232485
2014	1505.80070179943
2015	1506.64852929259
2016	1589.10575547994
2017	1662.33739135941
2018	1709.80456440163