Year	constant 2010 US$
1995	41595.9999529527
1996	41308.6565329174
1997	40266.1546919045
1998	38985.6272309318
1999	35923.8079180499
2000	35891.0331847397
2001	35153.0105556567
2002	35636.3603621936
2003	41332.222133429
2004	44971.8824791805
2005	47983.2400906745
2006	49342.6946287444
2007	49576.7038405222
2008	47898.7501602237
2009	41905.5096009352
2010	38577.3816572031
2011	39939.9318474037
2012	40287.4084092696
2013	38698.8725418702
2014	37158.6396671062
2015	35969.3493105175
2016	35887.1002017771
2017	33790.3343267077
2018	33537.8515333354