Year	U.S. dollars (Billions)
1980	-0.039
1981	-0.052
1982	0.133
1983	0.170
1984	0.174
1985	0.147
1986	0.162
1987	0.218
1988	0.082
1989	0.087
1990	0.183
1991	-0.237
1992	-0.167
1993	-0.079
1994	-0.067
1995	-0.195
1996	-0.253
1997	-0.312
1998	-0.183
1999	-0.244
2000	-0.043
2001	0.039
2002	0.056
2003	0.027
2004	0.156
2005	0.152
2006	0.305
2007	0.358
2008	0.314
2009	0.033
2010	-0.224
2011	-0.373
2012	-0.222
2013	-0.125
2014	-0.129
2015	-0.093
2016	-0.172
2017	-0.098
2018	-0.087
2019	-0.059
2020	-0.038
2021	-0.130
2022	-0.224
2023	-0.064
2024	-0.027
2025	-0.177
2026	-0.149
2027	-0.146
2028	-0.117
2029	-0.120