Year	current US$
1992	8037564.67198378
1993	8413214.10027685
1994	8786211.48602576
1995	10700998.8576248
1996	11142111.6493187
1997	11589270.3301463
1998	11983404.9108399
1999	12425705.2551946
2000	12993127.8805951
2001	13584788.6410477
2002	14106933.3524721
2003	14709018.0158355
2004	15443705.1100422
2005	16286372.3636389
2006	19619031.065128
2007	16939570.1145867
2008	18786417.7756884
2009	19332233.8892356
2010	19854894.2519108
2011	20567007.3176559
2012	21987430.5768812
2013	25072746.904821
2014	23413666.9257673
2015	25780880.9275723
2016	26827654.804371
2017	31546007.0567176
2018	34078252.1397954
2019	35470108.125833
2020	33741823.3948951
2021	37909209.8402938