Year	U.S. dollars (Billions)
2013	-0.372
2014	-0.148
2015	-0.147
2016	-0.408
2017	0.142
2019	-0.840
2020	-0.406
2021	-0.671
2022	-0.838
2023	-1.119
2024	-1.108
2025	-1.228
2026	-1.582
2027	-1.757
2028	-1.828
2029	-1.986