Year	current US$
1997	1875520000
1998	2984930000
1999	2854000000
2000	3099650000
2001	3461290000
2002	5577900000
2003	7134130000
2004	9676810000
2005	7898880000
2006	15181750000
2007	28859820000
2008	11799390000
2009	12140920000
2010	9428350000
2011	6325860000
2012	6474850000
2013	7128430000
2014	7519360000
2015	6034990000
2016	5262429994.284821
2017	6318340000
2018	7266520000
2019	7923300000
2020	8448550000
2021	10774070000
2022	8171270000