Year	current US$
1997	6574031359346.551
1998	6969671736084.197
1999	7428867003404.76
2000	7924858187464.57
2001	8298548269483.622
2002	8665341515823.462
2003	9114767275516.254
2004	9705995857344.76
2005	10384958670226.895
2006	11014940367942.451
2007	11631888851984.393
2008	12001101418734.756
2009	12002636791505.902
2010	12547966190444.693
2011	13008135869792.77
2012	13576850009004.537
2013	13979046720480.094
2014	14486041825994.986
2015	15020629467217.582
2016	15522063176074.705
2017	16117304184882.611
2018	16916283780674.697
2019	17688692366728.082
2020	17614036792351.57
2021	19365095633492.25