Year	constant 2010 US$
1990	3167.06208817709
1991	3096.44980276303
1992	2360.614694452
1993	1787.94375321082
1994	1416.44236632832
1995	1234.99654739013
1996	1238.48136232378
1997	1297.73381219033
1998	1414.02227815474
1999	1505.39050644998
2000	1658.80529519616
2001	1808.95740069391
2002	1964.98632844986
2003	2149.23250460856
2004	2327.65185795531
2005	2948.20604828813
2006	3921.02755330664
2007	4863.98288042342
2008	5267.371988685
2009	5642.52679697322
2010	5842.80578358576
2011	5676.45041334095
2012	5724.92083164488
2013	5981.53869483097
2014	6072.58603960072
2015	6063.73011692466
2016	5812.5843743252
2017	5739.59455488806
2018	5768.99240538437