Year	current US$
1993	4218866666.6666665
1994	3006733613.445378
1995	2914665132.3360186
1996	2976530769.230769
1997	3254054853.620956
1998	3480620593.973553
1999	2767795186.522262
2000	3109321262.8290944
2001	2683165467.625899
2002	3011762662.765506
2003	4077993665.875287
2004	6224820046.661051
2005	8445418908.729607
2006	10925291800.649084
2007	13190800917.0208
2008	18530653023.77832
2009	13247449206.065054
2010	15369787331.920996
2011	20209951979.142166
2012	20517975542.467823
2013	21477854620.18795
2014	21649248300.58391
2015	16320245790.62275
2016	12600664935.365204
2017	15332333644.872389
2018	17503983435.871864
2019	17920583863.57476
2020	16858735442.64882
2021	20667215944.464508
2022	19596823995.491425
2023	18052956573.964733