Year	constant 2010 US$
1991	2464.80755038169
1992	2644.16066225778
1993	2128.05366676477
1994	2022.31651319423
1995	2026.43391211828
1996	1825.58635177283
1997	1834.65724147047
1998	1848.16081580507
1999	1699.5423444004
2000	1276.89389404683
2001	1337.32873053664
2002	1330.88252360843
2003	1389.46632853425
2004	1466.7960974041
2005	1435.60002562493
2006	1479.68411724822
2007	1625.13436498176
2008	1785.43836032157
2009	1848.68926796563
2010	1747.43954064277
2011	1749.84673164401
2012	1819.90327635231
2013	1878.89132639921
2014	1914.76934118433
2015	1986.69870509852
2016	2011.11141543738
2017	1994.46670763885
2018	1954.23813333889