Year	current US$
1999	164810000000
2000	177511000000
2001	178664000000
2002	198311000000
2003	234945000000
2004	285621000000
2005	318700000000
2006	351635000000
2007	411558000000
2008	466307000000
2009	353364000000
2010	391177000000
2011	466943000000
2012	439128000000
2013	451677000000
2014	453700000000
2015	375530000000
2016	379409000000
2017	409220000000
2018	455188000000
2019	428878000000
2020	397957000000
2021	527496000000
2022	618868000000
2023	546765000000