Year	current US$
2000	475.02932739
2001	500.08016968
2002	531.89007568
2003	633.09393311
2004	708.57940674
2005	887.69561768
2006	1062.19836426
2007	1204.76379395
2008	1137.20910645
2009	1099.13916016
2010	1363.56091309
2011	1507.55664063
2012	1553.32824707
2013	1682.76391602
2014	1880.4420166
2015	1894.34753418
2016	2008.0982666
2017	2220.56420898
2018	2501.13964844
2019	2605.9934082
2020	2648.22412109
2021	3260.44873047
2022	3123.94702148