Year	current US$
2000	1636.52856445
2001	1559.82128906
2002	1763.69567871
2003	2240.74609375
2004	2760.83081055
2005	3014.10473633
2006	3194.03076172
2007	3815.33642578
2008	4107.01269531
2009	4011.93261719
2010	4975.47070313
2011	5909.14990234
2012	6071.65087891
2013	5843.17382813
2014	6130.99853516
2015	5322.97119141
2016	5453.92480469
2017	5813.61376953
2018	5857.28808594
2019	5545.91064453
2020	5958.765625
2021	7055.36816406