Year	current US$
1995	80000000
1996	135000000
1997	113000000
1998	95000000
2004	108000000
2005	124000000
2006	123000000
2007	132000000
2008	156000000
2009	192000000
2010	320000000
2011	405000000
2012	484000000
2013	208000000
2014	189000000
2015	186000000
2016	208000000
2017	214000000
2018	333000000
2019	418000000
2020	110000000