Year	constant 2010 US$
1981	2232.4124263551
1982	2239.50082240333
1983	2471.06423483706
1984	2449.48916592735
1985	2189.83178214969
1986	2599.89774329785
1987	2711.06576764322
1988	2795.61935342726
1989	2644.14145138469
1990	2631.57022201407
1991	2572.23136297432
1992	2708.8442059245
1993	2837.77541267542
1994	2981.59547608845
1995	3211.00597518248
1996	2875.84647539846
1997	2694.9052335462
1998	2623.14392583882
1999	2556.86113392061
2000	2689.87377222415
2001	2797.26925892293
2002	2818.48108573624
2003	2765.91921316321
2004	2717.34791617365
2005	2756.99444339307
2006	2771.07893661664
2007	2857.7577546079
2008	2804.59673936352
2009	2754.98711342074
2010	2926.74839442217
2011	2953.41470099015
2012	3045.51938664376
2013	3120.46464161541
2014	3083.79182270495
2015	3058.64194010628
2016	3101.09628310768
2017	3194.86111540448
2018	3254.83073637901