Year	current US$
2000	2689012979.35904
2001	3983708972.2649
2002	4569054771.53737
2003	6803191564.37857
2004	6633643732.56328
2005	4340143817.27809
2006	2915890827.57955
2007	5605605495.40221
2008	856515276.57584
2009	3353503537.65461
2010	4082946118.06778
2011	5455765551.93402
2012	5600611315.4669
2013	11218229704.2692
2014	11775805711.8105
2015	11886037248.4864
2016	12478362911.9851
2017	14577037150.3165
2018	11240277687.1313
2019	14694691174.7358
2020	10219223813.6333
2021	8742920116.14248