2017 25.0972602739726
2016 25.1592896174863
2015 25.0259154929577
2014 24.8975
2013 24.9961643835616
2012 25.1934523809524
2011 25.0413698630137
2010 25.5643835616438
2009 24.9709589041096
2008 24.6844262295082
2007 25.0344444444444
2006 25.1865030674847
2005 25.3851002865329
2004 24.8438040345821
2003 25.0170731707317
2002 24.8865384615385
2001 24.4143459915612