Year	constant 2010 US$
1977	4124192.64899669
1978	4290166.25399993
1979	4285136.67116732
1980	5547541.81052692
1981	4959090.25684548
1982	7846024.804488
1983	6628885.03446426
1984	7664962.88906575
1985	9148666.16842966
1986	9651616.56627198
1987	11643299.8263108
1988	13242681.7585095
1989	14987919.4024598
1990	15757433.3096423
1991	16672797.6716307
1992	18573972.0969384
1993	16260390.2786668
1994	17492618.3591095
1995	18840499.2457372
1996	19926890.889896
1997	20983098.9039559
1998	23950513.3481023
1999	26611097.3928097
2000	27405772.3565196
2001	27699679.4310251
2002	29472190.1094521
2003	28785194.9175613
2004	24137353.9611245
2005	28695257.3376001
2006	27962263.8705221
2007	28453700.6810457
2008	27051673.2533406
2009	25626778.1116853
2010	26623407.4074074
2011	26585732.6296351
2012	26526898.6452766
2013	25928220.1417452
2014	26333837.3131339
2015	27295376.4960704
2016	28537286.118243
2017	29308918.1364782
2018	31360528.8255885