Year	current US$
2007	58000000
2008	80000000
2009	76000000
2010	72000000
2011	70000000
2012	67000000
2013	81000000
2014	79000000
2015	69000000
2016	91000000
2017	91000000
2018	73000000
2019	72000000
2020	38000000