Year	current US$
1996	2243000000
1997	2530000000
1998	2616000000
1999	2493000000
2000	2702000000
2001	2810000000
2002	2948000000
2003	3272000000
2004	3867000000
2005	4176000000
2006	5100000000
2007	6030000000
2008	7006000000
2009	5766000000
2010	7460000000
2011	8879000000
2012	9620000000
2013	10711000000
2014	10970000000
2015	11250000000
2016	12500000000
2017	13070000000
2018	14790500000
2019	16637000000
2020	7600000000
2021	4210000000
2022	13526000000
2023	19594000000