Year	constant 2015 US$
1970	1708.1468019895601
1971	1698.959704852319
1972	1673.183470624235
1973	2183.933244533281
1974	2454.7741730244043
1975	2399.1731002896468
1976	2355.7432947462917
1977	2359.8550797495536
1978	2429.266560765808
1979	2409.4192075144488
1980	2171.9936165250233
1981	2315.45746104286
1982	2191.0162930940896
1983	2170.5362628219123
1984	2026.4997913937027
1985	2296.841328080702
1986	2413.4178381599163
1987	2377.9761711549004
1988	2383.5972079816866
1989	2421.5258599890226
1990	2466.0763453531727
1991	2601.123566516263
1992	2640.5382056453577
1993	2771.0127259641276
1994	2684.943590433424
1995	2834.6301232021337
1996	2733.100627965973
1997	2559.4094420334313
1998	2625.915211195732
1999	2658.832599637602
2000	2783.116176885581
2001	2837.372548190233
2002	2851.772050570086
2003	2901.4499198521535
2004	2821.341878649559
2005	2891.873287615655
2006	2906.269003463694
2007	2872.934132456719
2008	2825.0958544495156
2009	2878.111386162508
2010	2950.798726369784
2011	3036.4484938271476
2012	2970.2651883513795
2013	2851.0354341361467
2014	2774.694714084789
2015	2891.322102647494
2016	2893.0819496044846
2017	2903.5542751517496
2018	2890.493005481053
2019	2996.3173046865345
2020	2918.516063741857
2021	2973.0515099611625
2022	2923.222951882218
2023	2919.047163554609