Year	constant 2015 US$
2010	59326181274.05833
2011	62036890275.37435
2012	68458262173.54652
2013	72285443470.54547
2014	74191045399.3027
2015	75329730232.8055
2016	76047156235.02269
2017	78310886624.41959
2018	82113346146.21233
2019	85643699351.85614