Year	Percent
2001-01-01	4.51063734010993
2002-01-01	4.62155959001247
2003-01-01	5.17518341441633
2004-01-01	6.13022088868566
2005-01-01	7.35939965127068
2006-01-01	7.25450648013638
2007-01-01	6.46617928047345
2008-01-01	6.56454775715796
2009-01-01	8.00722914516428
2010-01-01	8.51928200417402
2011-01-01	7.76350688039203
2012-01-01	7.70925850767952
2013-01-01	7.88868812814993
2014-01-01	7.69602617694901
2015-01-01	7.29104271615108
2016-01-01	6.58658479617660
2017-01-01	6.43961615891230