Year	current US$
2000	47.13489151
2001	61.4104805
2002	77.6619339
2003	54.08104324
2004	65.09461212
2005	89.11562347
2006	87.39896393
2007	88.28649902
2008	74.60315704
2009	92.104599
2010	73.04418945
2011	95.24793243
2012	101.76835632
2013	101.10624695
2014	109.27742004
2015	94.91165924
2016	96.68874359
2017	94.76846313
2018	92.47520447
2019	103.72428894
2020	106.61138153
2021	106.34587097