Year	constant 2010 US$
1991	74785.6789453019
1992	76826.1041764124
1993	72508.7902216086
1994	72649.3884726316
1995	72559.133142506
1996	75759.4141580536
1997	60870.4450994299
1998	60569.4412487209
1999	67364.518151847
2000	67018.2649795843
2001	68610.9787477917
2002	69309.5358048666
2003	65902.5724570755
2004	67205.2122103838
2005	68880.7974978281
2006	64088.6024581561
2007	66131.9497118375
2008	61487.1741860649
2009	61512.5040014546
2010	60714.0586641469
2011	59219.4083793244
2012	58404.9823829397
2013	59573.495850337
2014	57900.1288191265
2015	58083.5684331699
2016	57430.5407854113
2017	55496.7844564696