Year	current US$
2002	-3201262532.35976
2003	-5910311860.90589
2004	-1514834878.67015
2005	-1441821521.44162
2006	-1398847453.11188
2007	-276992740.415588
2008	-2105798306.22771
2009	-2584464628.91346
2010	-4232819460.39356
2011	-6162839065.54025
2012	-9267833935.53839
2013	-9687812594.76006
2014	-10458847485.3952
2015	-7684286702.39719
2016	-7609872381.00371
2017	-9558000606.03475
2018	-11985119639.6323
2019	-13064068559.8071
2020	-5701990025.33176
2021	-5578368168.79761