Year	U.S. dollars (Billions)
1980	-3.856
1981	-7.643
1982	-7.681
1983	-5.648
1984	-8.175
1985	-8.478
1986	-9.163
1987	-7.223
1988	-10.389
1989	-18.500
1990	-15.710
1991	-10.640
1992	-10.363
1993	-9.361
1994	-15.972
1995	-18.894
1996	-14.696
1997	-12.438
1998	-18.707
1999	-22.543
2000	-16.362
2001	-8.441
2002	-16.097
2003	-28.752
2004	-41.310
2005	-44.014
2006	-46.219
2007	-63.935
2008	-51.010
2009	-45.181
2010	-45.956
2011	-45.235
2012	-68.251
2013	-50.969
2014	-44.099
2015	-57.037
2016	-41.445
2017	-35.707
2018	-31.452
2019	4.996
2020	29.960
2021	48.438
2022	18.320
2023	21.229
2024	8.610
2025	-3.789
2026	-10.249
2027	-11.966
2028	-12.734
2029	-11.131