Year	constant 2010 US$
1991	3049.10025986463
1992	3008.88085820165
1993	2888.13135841421
1994	2773.6357790095
1995	2739.99561572511
1996	2615.41425048055
1997	2687.2227625235
1998	2724.35538225139
1999	2756.40724999813
2000	2732.69663482552
2001	2730.1731034109
2002	2862.72921471422
2003	2881.87954707725
2004	2912.70737429668
2005	2962.1481940854
2006	2999.46184005996
2007	3136.26406625798
2008	3280.82537855752
2009	3372.55077758226
2010	3370.03949029432
2011	3426.3881386431
2012	3448.65707433121
2013	3546.50950259778
2014	3631.48644885879
2015	3641.16040997773
2016	3674.01895094985
2017	3650.9554283691
2018	3561.30871986426