Year	current US$
2001	322347.627611147
2002	258761.463208202
2003	269805.416176182
2004	283281.676589918
2005	298738.601641606
2006	303604.505732856
2007	1882820.5890031
2008	2086902.63748218
2009	5523495.39692445
2010	5715648.51882917
2011	5688923.67226148
2012	5925735.58368734
2013	6216532.1331264
2014	6956893.01114888
2015	7404489.29516139
2016	7909663.47715531
2017	8884688.69029929
2018	9302993.15296232
2019	9979898.68359106
2020	8705510.75259394
2021	9899546.00456472