Year	constant 2010 US$
1981	2540.63592995696
1982	2415.614150412
1983	2344.84479030894
1984	2452.95235631827
1985	2351.01533852502
1986	2458.57132277381
1987	2332.33376802528
1988	2323.37378027323
1989	2406.78083370672
1990	2472.37031918769
1991	2435.6077290598
1992	2519.77803276983
1993	2548.37068553227
1994	2626.78871679008
1995	2684.12515986195
1996	2723.4718353044
1997	2653.41752376641
1998	2673.34887774268
1999	2770.0547513525
2000	2720.94472285265
2001	2721.98720218131
2002	2744.33978056152
2003	2770.5112442983
2004	2846.35141312393
2005	2877.22182299312
2006	2912.0382163656
2007	2911.21472045201
2008	2929.36735561004
2009	2852.13877688191
2010	2897.48396856551
2011	2979.65835690579
2012	2996.11925507911
2013	3041.64407236451
2014	3122.17116921729
2015	3195.05905954973
2016	3256.99754739086
2017	3341.39884723198
2018	3411.0641604654