Year	current US$
1992	795000000
1993	872000000
1994	1251000000
1995	1818000000
1996	2320000000
1997	2721000000
1998	3191000000
1999	2954000000
2000	3202000000
2001	3506000000
2002	4046000000
2003	5234000000
2004	7096000000
2005	8697000000
2006	11541000000
2007	15322000000
2008	16143000000
2009	9811000000
2010	11691000000
2011	16290000000
2012	17227000000
2013	17865000000
2014	17964000000
2015	14719000000
2016	14434000000
2017	17033000000
2018	19681000000
2019	18959000000
2020	18441000000
2021	24446000000
2022	29501000000
2023	27114000000