Year	constant 2010 US$
1991	1573.27299033289
1992	1497.47709236049
1993	1399.01584232231
1994	1423.07048904636
1995	1338.44193599099
1996	1290.3124106365
1997	1384.53521302111
1998	1320.60195494775
1999	1659.60932327319
2000	1740.79874112078
2001	1814.83952093517
2002	1407.43139082794
2003	1621.8243002695
2004	1654.13298952505
2005	1524.77942075643
2006	1269.65293116122
2007	1209.04688290938
2008	1451.04226388215
2009	1580.75365125532
2010	1693.51784954162
2011	1041.18154485258
2012	1145.40636409988
2013	1102.12237308966
2014	937.164662548049
2015	1010.37374578343
2016	1018.10501718368
2017	903.96360331931