Year	current US$
1990	1926900000
1991	2805300000
1992	855100000
1993	2337500000
1994	4133400000
1995	4821100000
1996	7522120000
1997	5165040000
1998	1638900000
1999	1425010000
2000	1417300000
2001	2343830000
2002	1746510000
2003	5669550000
2004	1336990000
2005	7215850000
2006	4992750000
2007	5702980000
2008	1468230000
2009	3083370000
2011	1465370000
2012	4591100000
2013	5070260000
2014	5846510000
2015	3937640000
2016	6403530000
2017	24539990000
2018	29462230000
2019	30973800000
2020	2788890000
2021	15992410000
2022	32282890000