Year	current US$
2000	2020.52832031
2001	2052.34667969
2002	2306.12841797
2003	2784.53955078
2004	3366.34155273
2005	3536.32299805
2006	3857.4855957
2007	4367.53564453
2008	4297.47509766
2009	3914.19580078
2010	3956.38891602
2011	4199.08398438
2012	4242.23486328
2013	4304.47802734
2014	4697.76025391
2015	4433.85839844
2016	4017.34228516
2017	3910.81420898
2018	4226.20507813
2019	4268.67724609
2020	4906.23974609
2021	5738.48486328
2022	5138.63623047