Year	current US$
1994	20000000
1995	247200000
1996	367000000
1997	481700000
1998	548900000
1999	598700000
2000	598200000
2001	425500000
2002	298900000
2003	390500000
2004	527100000
2005	651400000
2006	641900000
2007	755500000
2008	1101600000
2009	1179400000
2010	1420500000
2011	1398900000
2012	1426000000
2013	1767000000
2014	1785900000
2015	2023600000
2016	2184000000
2017	2375900000
2018	2177600000
2019	2296500000
2020	2379200000
2021	2883500000
2022	3551600000