Year	constant 2010 US$
1980	4221.28643112505
1981	4170.75820819822
1982	4063.32458296947
1983	3895.71530557187
1984	3784.00771388917
1985	3687.76419213829
1986	3733.38491881008
1987	3725.2472889015
1988	3615.77723645281
1989	3551.51772092234
1990	3505.62252522742
1991	3680.19860146945
1992	3839.28023601234
1993	3685.9561354726
1994	3663.21823119608
1995	3721.77689113865
1996	3758.55537793865
1997	3837.22728249356
1998	3886.61014271757
1999	3944.17301312992
2000	4012.05360390117
2001	3994.53758642478
2002	4122.8584354869
2003	4234.54993618512
2004	4682.76895394726
2005	4725.47436891937
2006	4975.02312097143
2007	5150.42449424174
2008	5191.48093376577
2009	5112.64456564176
2010	5324.6170395396
2011	5497.56650859614
2012	5675.61588748899
2013	5890.35311643777
2014	6154.4888863255
2015	6412.09882646306
2016	6365.49983367808
2017	6193.21639414852
2018	6073.19437554024