Year	current US$
1993	12000000
1994	48300000
1995	58140000
1996	5600000
1998	144320000
1999	102490000
2000	129090000
2001	82200000
2002	721640000
2003	1755120000
2004	2803950000
2005	5085620000
2006	10324970000
2007	21667660000
2008	8880420000
2009	8653170000
2010	7376360000
2011	8253250000
2018	15652460000
2019	16000060000
2020	17710500000
2021	17024450000
2022	15704590000