Year	U.S. dollars (Billions)
2012	-2.036
2013	-2.016
2014	-1.838
2015	-0.147
2016	0.474
2017	0.007
2018	-0.298
2019	0.770
2020	-0.432
2021	-1.519
2022	-2.794
2023	-3.031
2024	-3.006
2025	-2.728
2026	-2.552
2027	-2.486
2028	-2.403
2029	-2.231