Year	constant 2010 US$
1970	16142.2146229203
1971	16795.2391456782
1972	17776.7189699124
1973	19181.5267918661
1974	18080.9308835044
1975	16376.044996863
1976	16673.3759260867
1977	15968.3881210998
1978	16164.7545157806
1979	16401.3499717247
1980	16311.7659760153
1981	16889.8586826619
1982	16372.0893586142
1983	16933.1584728361
1984	17037.9039063387
1985	16792.1756208761
1986	18171.6210299943
1987	18656.5211585219
1988	19437.8964657692
1989	19467.5255091537
1990	19079.4979203336
1991	17148.9803019955
1992	17217.415996644
1993	18172.2726726594
1994	19178.4371646866
1995	19809.0410053372
1996	19874.4173937555
1997	20655.9520593368
1998	20771.9407896047
1999	21514.2513742592
2000	21718.8206887079
2001	22932.7055608581
2002	23651.1417126371
2003	24924.4978128658
2004	25369.5488441256
2005	25419.4978122132
2006	25455.2816731364
2007	26886.1273252632
2008	25450.9641995514
2009	26137.3430533524
2010	26603.7568955635
2011	27680.3860411815
2012	27977.9452817857
2013	29478.400471655
2014	30105.6793961007
2015	30786.4555425113
2016	31748.6687346201
2017	32239.72163621