Year	current US$
2000	1849.91601563
2001	1879.93457031
2002	2084.7199707
2003	2814.88061523
2004	3312.74121094
2005	3405.88500977
2006	3545.92822266
2007	4064.87646484
2008	4653.50585938
2009	4638.43896484
2010	4531.03369141
2011	4930.14111328
2012	4704.47265625
2013	4954.92431641
2014	5080.125
2015	4442.40136719
2016	4542.79492188
2017	4782.64697266
2018	5176.98388672
2019	5049.57714844
2020	5104.02539063
2021	5680.23144531