Year	constant 2010 US$
1994	20671.9686073388
1995	19556.0061243021
1996	21398.6599650016
1997	21353.3516574763
1998	22186.0329144235
1999	22632.8159404645
2000	24937.44305938
2001	23888.2272593359
2002	26614.6225269865
2003	24219.4133798759
2004	22173.6946894013
2005	22477.2014582083
2006	22575.267551842
2007	24305.1081418324
2008	26384.2044048714
2009	24884.9223259198
2010	24270.5713470381
2011	25307.752012583
2012	26311.4185363394
2013	27046.9456399015
2014	26393.4910118343
2015	25444.8038917496
2016	24139.9056466027
2017	23933.8303152244