Year	constant 2010 US$
1993	17638.5595944413
1994	17547.4069641071
1995	18011.4636291336
1996	18194.1435999588
1997	19287.7736203967
1998	19537.7139105101
1999	19790.6876992461
2000	19067.0711446775
2001	19078.0550917282
2002	19148.7533897642
2003	19321.9855938363
2004	19736.3882746056
2005	19937.1140494026
2006	20361.3161158867
2007	21684.6047324138
2008	21908.1534329234
2009	21196.4590757813
2010	22094.6892223815
2011	21851.0411744618
2012	22032.7146076606
2013	22282.337101093
2014	22331.1794194225
2015	22288.1785199839
2016	22322.0327114719
2017	21133.9381226258