Year	constant 2010 US$
1995	20768.2291603907
1996	22378.8479849609
1997	22898.8859570287
1998	23941.0099595966
1999	25460.5953834568
2000	26342.8260568761
2001	25967.0891807433
2002	26626.3891342008
2003	25679.5569378562
2004	30670.9066663919
2005	28432.9740357582
2006	28488.6054947377
2007	30712.3588783487
2008	35908.3066199203
2009	36320.7946382706
2010	35157.0763204647
2011	37178.2812943274
2012	36052.173045816
2013	37970.6160569471
2014	40642.1160653619
2015	41693.4030011427
2016	41039.6074950861
2017	42474.7469233349
2018	42935.6203335017