Year	constant 2010 US$
1970	3742.80828399907
1971	3834.02315146026
1972	4061.22012395459
1973	4233.10294046748
1974	4661.10072595146
1975	5532.03936424782
1976	6440.57462341685
1977	7197.15432640375
1978	7917.5938621124
1979	8659.98647944964
1980	9173.78780569755
1981	9408.16482368309
1982	9418.8747716498
1983	9230.17562880887
1984	9315.21348262343
1985	9389.62825395008
1986	9592.80062622978
1987	9918.57833273914
1988	10665.2248047161
1989	11425.7952120037
1990	12026.4033042837
1991	12439.0323766971
1992	12888.8838287686
1993	13332.575437453
1994	13954.885988878
1995	14736.8776237922
1996	15193.4620113725
1997	15871.6084604188
1998	16577.0327879946
1999	17256.851592428
2000	18306.665059282
2001	18280.2135257269
2002	18685.6556885791
2003	19035.3611499787
2004	18991.7828034799
2005	19585.1242660293
2006	19870.7522043411
2007	20590.9521864608
2008	21142.0208113957
2009	20466.5636022539
2010	21087.7946931036
2011	21279.4003504869
2012	21654.7210146231
2013	22322.2206570606
2014	23747.9042763263
2015	25659.9696064178
2016	26510.0665498094
2017	27523.5091326042
2018	28385.0649671709