Year	current US$
1990	4917226.89979239
1991	4742437.35878504
1992	4740990.77462074
1993	4237830.33522396
1994	3743688.58642259
1995	3829315.40234768
1996	3738922.22302351
1997	3505589.42842436
1998	2494022.3282358
1999	2473665.84040994
2000	2868331.80659054
2001	2466411.41018265
2002	2497742.80574615
2003	2795092.78319269
2004	3333848.61580344
2005	3973747.02517918
2006	4489954.2513573
2007	4608054.28530977
2008	5234241.81146176
2009	3787882.64028169
2010	4657477.89850776
2011	6495815.04436519
2012	7452245.48907353
2013	8175710.26844632
2014	8755075.72662971
2015	6938868.78865389
2016	5873954.05540588
2017	5774358.87538349
2018	7533512.44441736
2019	7090897.54247014
2020	6669233.291408
2021	8379686.5009482