Year	constant 2010 US$
1993	2520.42715741892
1994	2578.4287896996
1995	2619.61013775806
1996	2506.88313313516
1997	2522.65579924201
1998	2561.94422954918
1999	2760.3553450456
2000	2560.06169281562
2001	3000.72381974089
2002	3453.86258339128
2003	3791.7943315314
2004	3731.08619557989
2005	4251.24243119551
2006	4429.71375813036
2007	5044.88507200073
2008	4801.02323170034
2009	4925.57205454035
2010	5355.08543284137
2011	5469.5674125314
2012	4561.21091763218
2013	4492.77204568962
2014	4454.01085206814
2015	4152.20618242849
2016	4287.98663195678
2017	4323.10141498062