Year	current US$
2000	19.93199105978849
2001	20.594983254548954
2002	21.771199047162643
2003	33.46687525524861
2004	37.916499869428534
2005	43.39283474336562
2006	49.90325954211098
2007	53.89887876973727
2008	62.09635135195591
2009	56.65088032537979
2010	60.1874674138688
2011	67.17484644223268
2012	69.60961819218166
2013	77.14224999944639
2014	80.02705501797506
2015	71.69262860258169
2016	62.50616285447706
2017	60.64952524398167
2018	59.44377379049645
2019	61.86688351092892
2020	64.64604398961292
2021	72.95963883023491