Year	current US$
1994	4463800000
1995	5139400000
1996	5376800000
1997	5852800000
1998	6207400000
1999	6864200000
2000	6324600000
2001	6066000000
2002	5314200000
2003	5981100000
2004	7006900000
2005	7902800000
2006	8152500000
2007	8862900000
2008	10581400000
2009	11608700000
2010	13447000000
2011	14958500000
2012	16343900000
2013	18328700000
2014	19150900000
2015	19348200000
2016	21049600000
2017	22095400000
2018	22658100000
2019	23559700000
2020	21193200000
2021	24947100000
2022	28146800000
2023	25764000000