Year	current US$
2000	63.33945953
2001	95.43252171
2002	57.61300001
2003	75.31943747
2004	95.73533351
2005	108.80485809
2006	107.85160301
2007	92.12444525
2008	129.20439197
2009	105.11143048
2010	112.83712362
2011	120.98449293
2012	122.74036268
2013	117.56612106
2014	194.56210755
2015	171.11011652
2016	186.15094558
2017	181.21282388
2018	193.20596672
2019	189.9921215
2020	158.16915042
2021	157.90319744