Year	current US$
2006	-54425925.925925925
2007	-88492592.59259258
2008	-130588888.88888888
2009	-116514814.8148148
2010	-88874074.07407407
2011	-76533333.33333333
2012	-91514814.8148148
2013	-50196296.29629629
2014	-65885185.18518518
2015	-71048148.14814815
2016	-72144444.44444443
2017	-108881481.48148148
2018	-269474074.07407403