Year	current US$
2007	37000000
2008	43000000
2009	49000000
2010	46000000
2011	39000000
2012	39000000
2013	48000000
2014	47000000
2015	45000000
2016	66000000
2017	67000000
2018	68000000
2019	58000000
2020	30000000