Year	constant 2015 US$
1971	4445.155619343038
1972	4615.290445155582
1973	4955.243842948641
1974	4928.861115329608
1975	4970.484761950903
1976	5439.784661168291
1977	4909.427047075297
1978	5885.496329476919
1979	6717.307276648863
1980	6560.086085382252
1981	6357.932039010059
1982	6117.460459170318
1983	6054.452075589029
1984	6242.911049924991
1985	6853.565557101135
1986	6824.244125503026
1987	6757.488192187259
1988	7054.09227275397
1989	7828.413261407485
1990	8480.025786755457
1991	8656.094328222393
1992	9300.602668562327
1993	9760.399642138931
1994	9405.30047021873
1995	9042.202082772788
1996	9885.08263681501
1997	11046.993152062361
1998	10965.241416233264
1999	10895.305544520596
2000	11130.823830561116
2001	11119.985263884506
2002	10183.815184100058
2003	10060.211227608073
2004	10515.49709571286
2005	11403.444844052097
2006	12213.62126932719
2007	12237.70252851102
2008	11464.579569186735
2009	11320.947175251154
2010	11626.80542744511
2011	12868.9486410086
2012	14078.929376023314
2013	13167.820823709415
2014	13476.643911312442
2015	14442.339493161437
2016	15810.793644165642
2017	16715.24083419413
2018	17706.90360043597
2019	18671.60174573708
2020	16384.671765562874
2021	16204.953931008607
2022	15617.643224277392
2023	16471.154009490558