Year	current US$
2000	311.62489638
2001	440.4480102
2002	446.97794479
2003	483.54313765
2004	496.16256878
2005	554.58738522
2006	598.91654376
2007	673.37232344
2008	835.32439071
2009	836.94781108
2010	884.46297542
2011	965.64272139
2012	998.37215284
2013	997.78164307
2014	1066.55957273
2015	1048.53656632
2016	1090.8807022
2017	1166.91642543
2018	1465.47848716
2019	1448.77576374
2020	1377.78940108
2021	1669.31583054