Year	current US$
2006	-5241509410.980137
2007	-6682559230.821015
2008	-7953744885.833329
2009	-5191003993.50955
2010	-6702379007.080106
2011	-7863402583.992838
2012	-11957341914.62042
2013	-12279152499.190056
2014	-9811128872.793346
2015	-5204422209.51195
2016	-3780651035.8041644
2017	-4226370693.4898334
2018	-5550390595.523555
2019	-10406096206.507645
2020	-17031880501.228874
2021	-9577991549.311375
2022	-16172717011.120518
2023	-16767018583.248335