Year	current US$
2000	25.29755847
2001	25.55315886
2002	26.32953278
2003	26.317551
2004	27.81739493
2005	30.02246182
2006	34.73416676
2007	41.5171085
2008	49.02732187
2009	49.40025026
2010	56.63467923
2011	64.96085074
2012	78.77218813
2013	80.47931122
2014	77.99540231
2015	76.8766392
2016	71.03777604
2017	77.49196983
2018	100.83728086
2019	111.23620258
2020	91.39231554
2021	135.16587833