Year	current US$
2000	14.63692498
2001	13.42831373
2002	14.63997545
2003	17.07241807
2004	18.21346662
2005	22.30372213
2006	37.62406358
2007	32.48878885
2008	41.89446955
2009	37.91038957
2010	34.56807642
2011	37.74944572
2012	40.36230969
2013	61.75163161
2014	57.02091948
2015	43.12496248
2016	47.93443932
2017	44.1525431
2018	40.29351355
2019	42.87073453
2020	72.7491202
2021	81.31547138