Year	current US$
1998	356590000
1999	313690000
2000	363790000
2001	1103100000
2002	2489000000
2003	3403000000
2004	10964000000
2005	15857840000
2006	25234970000
2007	30642040000
2008	15149440000
2009	13072970000
2010	14200970000
2011	14023920000
2013	24574280000
2014	22386840000
2015	18539110000
2016	18072690000
2017	23621180000
2018	20853790000
2019	26110300000
2020	25513180000
2021	32288880000
2022	28983930000