Year	current US$
2000	374.18673571
2001	368.24658908
2002	435.10391357
2003	584.0342068
2004	660.64434378
2005	681.45378219
2006	716.50783432
2007	835.90869968
2008	926.28794809
2009	912.48303477
2010	893.69103644
2011	966.3535317
2012	915.39001721
2013	978.28227741
2014	992.59609694
2015	845.2057412
2016	839.16140606
2017	880.12065055
2018	957.82573592
2019	1000.32444624
2020	887.95697544
2021	1014.5056945