Year	current US$
1992	6700000
1994	1632000000
1995	1778600000
1996	2365700000
1997	154000000
2004	29800000
2005	904600000
2006	297600000
2007	1654700000
2008	1120400000
2009	1592800000
2010	166000000
2011	538300000
2012	1401000000
2013	350100000
2015	883340000
2016	1688400000
2017	6097650000
2018	1182200000
2019	2976610000
2020	1951750000
2021	250000000
2022	100000000