Year	constant 2010 US$
1989	19037.4803734462
1990	18322.0289619912
1991	17207.8823145002
1992	16040.1117918034
1993	15693.3097376884
1994	15759.634416546
1995	16649.7983357681
1996	17484.8953283631
1997	17472.3274625844
1998	19261.3368735667
1999	20564.4089833014
2000	20757.5494556941
2001	20596.0847355863
2002	20983.2460843052
2003	20435.2115730109
2004	19748.0376404389
2005	20949.4960258531
2006	21163.6303140699
2007	21016.6141274061
2008	19911.2071383213
2009	17633.7228250636
2010	17544.5565754405
2011	16963.6486729012
2012	17418.6522876277
2013	16949.0419130397
2014	17546.6611782799
2015	17507.5941250094
2016	16942.0553019811
2017	18085.9616291141