Year	constant 2015 US$
1987	3276.8241253665396
1988	3251.5361118846895
1989	3155.84011683468
1990	3502.5118224883213
1991	3505.4403586584144
1992	3558.3538991215128
1993	3791.7369556021995
1994	3527.8764453483623
1995	3663.9087495059593
1996	3909.695629088509
1997	4169.615103050234
1998	4148.185632819152
1999	4070.786413037768
2000	4193.88056919721
2001	3855.360135784133
2002	3952.7329072228085
2003	4217.910014372411
2004	4558.615027275339
2005	4781.545259201968
2006	4893.0877326879445
2007	5110.363757306956
2008	5060.313114059484
2009	4808.452416141374
2010	5247.905821151235
2011	5802.8673659849355
2012	5909.166563775245
2013	6273.464900062437
2014	6382.902509441283
2015	6632.38544470421
2016	6791.313944702575
2017	7101.062433877408
2018	7051.851411085979
2019	7056.308393556103
2020	7213.443202077871
2021	8247.37450661546
2022	9710.02008463326
2023	10904.034618885802