Year	current US$
1996	99000000
1999	139000000
2006	132500000
2008	205000000
2009	127000000
2011	169700000
2012	360000000
2013	533970000
2014	800940000
2018	300000000
2019	220200000
2020	147160000
2021	98410000
2022	68600000