Year	current US$
2000	45.04007405
2001	51.39627385
2002	55.07719716
2003	59.86654394
2004	68.26153871
2005	73.46460566
2006	81.3758161
2007	97.21613799
2008	97.99929706
2009	98.07019969
2010	100.91257147
2011	100.14671211
2012	105.70478658
2013	107.06005107
2014	113.04068753
2015	112.57622341
2016	114.52327232
2017	118.91349438
2018	120.74129963
2019	114.53436203
2020	119.38729684
2021	129.62498839