Year	current US$
2000	35.33325535
2001	42.15332319
2002	45.01806333
2003	65.01867822
2004	71.32050512
2005	71.02369974
2006	66.72084134
2007	71.6740336
2008	39.62156205
2009	45.53666335
2010	51.5145017
2011	69.35973834
2012	82.229996
2013	103.61711065
2014	113.92124275
2015	93.63432777
2016	75.83964775
2017	98.38410358
2018	80.44239692
2019	86.80074038
2020	85.78990016
2021	90.61541665