Year	constant 2010 US$
1968	2674773002.13753
1969	2679346611.6398
1970	2922851889.60817
1971	3038769233.72568
1972	3662514942.64642
1973	2791005767.51577
1974	3326275789.3326
1975	2857086539.19234
1976	3505592823.70318
1977	3417590268.55467
1978	3458910464.76973
1979	3409389313.58952
1980	3391410296.96979
1981	3456229383.34623
1982	3831896204.66774
1983	3684909858.07376
1984	4088964600.57684
1985	4731951011.41744
1986	4528661954.93008
1987	4150787184.01188
1988	4469993584.74534
1989	4904644197.64091
1990	5437548559.29498
1991	4537651463.23995
1992	5570183234.73211
1993	5507887519.21308
1994	5899956250.46488
1995	6605238376.9531
1996	7094299171.79187
1997	6519443771.27268
1998	7057710295.77375
1999	8182502810.52736
2000	7237342751.53365
2001	7324083621.25345
2002	8567789982.93739
2003	6072334015.29903
2004	7131361179.7654
2005	9367383091.46049
2006	9771595544.52965
2007	7064964986.69951
2008	6082770289.69102
2009	6299294351.23074
2010	7150625982.90598
2011	8314137141.02736
2012	7740507179.20695
2013	8683987261.93377
2014	8510307516.6951
2015	5371426426.80058
2016	5354845859.72172
2017	5143393882.29248
2018	5194827821.11541