Year	current US$
2000	429.56253052
2001	558.32427979
2002	581.97772217
2003	628.84716797
2004	650.58306885
2005	727.70440674
2006	782.64221191
2007	881.10369873
2008	1069.66259766
2009	1025.8807373
2010	1050.42126465
2011	1143.13793945
2012	1196.20715332
2013	1188.28283691
2014	1260.87524414
2015	1235.61889648
2016	1278.63244629
2017	1361.48278809
2018	1660.9864502
2019	1643.56970215
2020	1542.32263184
2021	1860.78369141