Year	current US$
1995	13464050000
1996	14053990000
1997	10450200000
1998	11637000000
1999	7118350000
2004	7547080000
2005	5132820000
2006	15291090000
2007	18133580000
2008	26642030000
2009	36644580000
2010	54005130000
2011	36849337000
2012	37793060000
2013	32827880000
2014	27554220000
2015	20301170000
2016	23915300000
2017	37054180000
2018	17827010000
2019	13887700000
2020	12726730000
2021	7239910000
2022	13268920000