Year	constant 2015 US$
1980	592.8809476112748
1981	634.1924724624979
1982	642.7462012413373
1983	694.0461445617725
1984	710.6374143499917
1985	762.0540873199235
1986	773.9237650044303
1987	796.9779498663431
1988	833.9737490221303
1989	869.391233274696
1990	860.0096632419638
1991	852.9975306861204
1992	923.4374503287717
1993	978.735724489747
1994	1137.7141687076785
1995	1268.6780107411025
1996	1380.3335622046743
1997	1499.446450300386
1998	1650.4973938979979
1999	1797.2957311893435
2000	2015.381363684721
2001	2026.2791551289151
2002	2099.900150721154
2003	2156.347922544145
2004	2344.518781313023
2005	2474.8248547349863
2006	2639.9627168040092
2007	3005.2294077009888
2008	3181.4508182762606
2009	3101.3938405561353
2010	3124.5720901327686
2011	3208.3671257524657
2012	3204.6018829006207
2013	3188.569676552247
2014	3174.7053165583106
2015	3169.0789008256347
2016	3267.8790154488684
2017	3376.9382829899982
2018	3463.812818895133
2019	3667.057364602504
2020	2876.153428384281
2021	3050.775627163331
2022	3551.248241872344
2023	3699.596306704858