Year	constant 2015 US$
1970	2386.2044668765025
1971	2665.849168264524
1972	2666.4752844162444
1973	2817.778077231439
1974	2472.990602093671
1975	2332.5916202431645
1976	2503.707775721754
1977	2449.8143986955397
1978	2576.8001803524003
1979	2831.667118987564
1980	2633.490727122402
1981	2377.1857271658146
1982	2344.5477187442534
1983	2353.8214002363293
1984	2386.4869152369934
1985	2483.927286695292
1986	2623.051383141199
1987	2629.2751037498974
1988	2580.845415891713
1989	2669.6063990845873
1990	2547.019723794818
1991	2480.8414056214697
1992	2459.8698397417797
1993	2537.3678082935794
1994	2447.9377227312225
1995	2584.5048212886777
1996	2741.6574808748896
1997	2731.016202370966
1998	2762.4591404870475
1999	2794.5422991235696
2000	2908.188472152097
2001	3097.4868642359
2002	3253.267066787814
2003	3408.056371176809
2004	3501.4472705319913
2005	3722.968662138791
2006	3787.228371440825
2007	3783.6762943531016
2008	3891.48478167141
2009	3842.5759713262905
2010	4046.585287102514
2011	4166.407231111326
2012	3975.0180776792986
2013	3943.159994028874
2014	3933.4161824453827
2015	4048.46711296568
2016	4329.727670855254
2017	4346.504590797043
2018	4277.342015492725
2019	4421.29454588713
2020	4223.588172091826
2021	3855.80793268071
2022	3591.804947632629
2023	3822.1602635562426