Year	current US$
2000	37.06412504687388
2001	32.06107458972405
2002	35.81052526034112
2003	44.25206041238182
2004	56.95404523678124
2005	72.84609447921626
2006	83.52193305927676
2007	101.34241334109524
2008	112.40531502226236
2009	85.46568147648156
2010	101.6691944744665
2011	111.91148445491902
2012	117.63999047184325
2013	130.27933489022078
2014	121.3527539403177
2015	105.33618123335644
2016	102.78803329701755
2017	105.84565900779415
2018	108.97680411456057
2019	116.65119543712359
2020	116.98436083474606
2021	141.4420039535462