Year	U.S. dollars (Billions)
1980	-0.043
1981	-0.004
1982	-0.043
1983	-0.029
1984	-0.033
1985	-0.049
1986	-0.087
1987	-0.073
1988	-0.035
1989	-0.033
1990	-0.089
1991	-0.062
1992	-0.072
1993	-0.006
1994	-0.024
1995	-0.093
1996	-0.033
1997	-0.025
1998	-0.063
1999	-0.018
2000	-0.013
2001	-0.017
2002	-0.016
2003	-0.025
2004	-0.022
2005	-0.088
2006	-0.044
2007	-0.106
2008	-0.197
2009	-0.179
2010	-0.202
2011	-0.166
2012	-0.140
2013	-0.050
2014	-0.253
2015	-0.154
2016	-0.098
2017	-0.162
2018	-0.182
2019	-0.112
2020	-0.195
2021	-0.286
2022	-0.313
2023	-0.237
2024	-0.216
2025	-0.200
2026	-0.170
2027	-0.153
2028	-0.159
2029	-0.251