Year	U.S. dollars (Billions)
2000	-0.060
2001	-0.052
2002	-0.047
2003	-0.053
2004	-0.059
2005	-0.076
2006	-0.050
2007	-0.087
2008	-0.130
2009	-0.111
2010	-0.079
2011	-0.038
2012	-0.084
2013	-0.049
2014	-0.036
2015	-0.038
2016	-0.052
2017	-0.058
2018	-0.259
2019	-0.233
2020	-0.189
2021	-0.183
2022	-0.162
2023	-0.173
2024	-0.142
2025	-0.136
2026	-0.127
2027	-0.118
2028	-0.103
2029	-0.108