Year	current US$
2000	33.45507960443699
2001	30.85037216635013
2002	29.67946147005006
2003	43.55090281558017
2004	52.204264999426826
2005	58.51077326362534
2006	65.03987273237823
2007	71.99194958329149
2008	76.8264327821179
2009	76.60549779281624
2010	86.63948627856874
2011	94.35793085383769
2012	93.4981205539287
2013	95.36388971643773
2014	92.76183460307216
2015	84.6008943226225
2016	77.84790315030425
2017	79.66468654868022
2018	79.18724914492168
2019	78.40671641127658
2020	74.57151760765177
2021	84.3473788668171