Year	constant 2010 US$
1991	2948.69984760943
1992	2772.15045629877
1993	3020.5001186601
1994	2366.67051488761
1995	2720.82223931552
1996	2893.24752740653
1997	2856.04214851198
1998	2968.09067205883
1999	3018.14941698726
2000	3030.31236163286
2001	2831.71988445772
2002	2821.12704046106
2003	2880.39546147
2004	2893.32763571365
2005	2852.16814485013
2006	2850.91645607415
2007	2934.94787599495
2008	3002.71846247885
2009	3115.8144023262
2010	3172.96396198109
2011	3206.5438144044
2012	3140.33328905711
2013	3164.59118115359
2014	3218.2840219674
2015	3268.42461463077
2016	3299.11756953763
2017	3299.74896844403