Year	constant 2010 US$
1991	14417.1269239127
1992	14886.0072165229
1993	14994.8405435923
1994	14982.2548023961
1995	14761.9580782135
1996	15095.8014347334
1997	14569.9077489429
1998	14361.0647333717
1999	14788.1555259944
2000	15090.6998527445
2001	14737.4881374083
2002	14930.8871070105
2003	14896.3937249064
2004	15291.1924030138
2005	15025.1688769837
2006	15361.861682831
2007	15747.2674377077
2008	16281.0729042629
2009	16696.2819107938
2010	16955.2727610612
2011	18155.337170583
2012	17225.9046384701
2013	17151.3892658346
2014	18391.013791382
2015	20060.3527588661
2016	21282.281473253
2017	21475.7048970949
2018	21691.3383276014