Year	US Dollars
1967	-661985951.28097
1968	-453990361.19278
1969	-448990760.1848
1970	-691985405.29189
1971	-598764552.70895
1972	-484834888.92716
1973	-175629613.16561
1974	-622599969.69697
1975	-1308499989.89899
1976	-1154100232.32323
1977	-1472700040.40404
1978	-1646299898.9899
1979	-2377700909.09091
1980	-2750997313.13131
1981	-3005400898.9899
1982	-3631473222.74882
1983	-3173052834.64567
1984	-3599825949.83675
1985	-3859113944.59103
1986	-3434207780.53317
1987	-2591012432.27498
1988	-3110044853.31814
1989	-3158988028.20209
1990	-3133969017.90305
1991	-709412942.79635
1992	-1541373257.1982
1993	-3157882541.93827
1994	-1433344081.69643
1995	-1644942724.83549
1996	-2864553778.88745
1997	-2927097661.62311
1998	-648129007.98287
1999	-1015745719.5946
2000	-922155109.92994
2001	-761027138.4404
2002	-65362130.56187
2003	494007170.9066
2004	1012767066.1803
2005	-4242439047.40084
2006	-10176488474.1198
2007	-9998334273.39686
2008	-18418712477.9164
2009	-12242099510.4353
2010	-10354157493.2251
2011	-10693394445.8793
2012	-17978012162.4843
2013	-15674981408.0317
2014	-15678383665.7815
2015	-17439641769.5025
2016	-19547003198.10929
2017	-28413120635.0418