Year % 1982 35.41906 2001 77.63736 2002 77.70053 2003 79.22515 2004 79.87493 2007 100 2008 98.8228 2009 97.83345 2010 99.42446 2011 96.98246 2012 94.51862 2013 97.5 2016 97.97357 2017 99.10314