Year	current US$
2000	1572.29592159
2001	1595.38415234
2002	1788.37250336
2003	2183.64314549
2004	2512.53966384
2005	2593.6073291
2006	2716.63050663
2007	3065.91108961
2008	3395.28622912
2009	3348.52677939
2010	3235.02319063
2011	3462.45455531
2012	3264.73082962
2013	3437.01399145
2014	3506.55661352
2015	3039.79389894
2016	3196.24491454
2017	3342.36558102
2018	3536.91247258
2019	3385.53907962
2020	3650.94557287
2021	4068.9423898