Year	U.S. dollars (Billions)
1980	-0.004
1981	-0.005
1982	-0.017
1983	-0.012
1984	-0.005
1985	0.009
1986	0.012
1987	0.009
1988	-0.003
1989	-0.019
1990	0.015
1991	-0.026
1992	-0.029
1993	-0.049
1994	-0.040
1995	-0.017
1996	-0.007
1997	-0.032
1998	-0.041
1999	-0.062
2000	-0.162
2001	-0.190
2002	-0.165
2003	-0.184
2004	-0.155
2005	-0.151
2006	-0.025
2007	-0.052
2008	-0.145
2009	-0.083
2010	-0.046
2011	-0.020
2012	-0.033
2013	-0.073
2014	-0.136
2015	-0.175
2016	-0.163
2017	-0.158
2018	-0.151
2019	-0.185
2020	-0.128
2021	-0.158
2022	-0.234
2023	-0.091
2024	-0.069
2025	-0.073
2026	-0.074
2027	-0.077
2028	-0.080
2029	-0.083