Year	current US$
1994	2822000000
1995	2939000000
1996	4846000000
1997	4969000000
1998	4491000000
1999	4444000000
2000	4577000000
2001	4697000000
2002	5414000000
2003	5690000000
2004	8481000000
2005	10001000000
2006	11713000000
2007	14734000000
2008	18699000000
2009	14411000000
2010	17729000000
2011	20618000000
2012	21373000000
2013	21851000000
2014	14582000000
2015	12202000000
2016	12135000000
2017	13936000000
2018	15536000000
2019	17154000000
2020	15279000000
2021	18069000000
2022	16138000000
2023	15754000000