Year	current US$
2000	356.74414063
2001	326.96624756
2002	322.87408447
2003	349.77902222
2004	427.43676758
2005	500.87451172
2006	571.89831543
2007	649.92242432
2008	726.73669434
2009	738.284729
2010	870.70959473
2011	994.66607666
2012	1081.46069336
2013	1183.62084961
2014	1150.06164551
2015	1133.27978516
2016	1179.73364258
2017	1367.71643066
2018	1457.27282715
2019	1369.48400879
2020	1280.63232422
2021	1518.04003906
2022	1380.68823242