Year % of cohort 1975 38.1633987426758 1977 68.9883270263672 1978 76.0337600708008 1981 92.4307632446289 1982 83.3236083984375 1983 81.2888107299805 1984 74.8095626831055 1987 82.837287902832 2005 80.9356536865234 2006 79.8105316162109 2008 94.0604934692383 2009 81.5871505737305 2010 88.7649612426758 2011 95.8456573486328 2012 93.146858215332 2013 91.0050964355469 2014 96.8470764160156 2015 95.5063934326172 2016 73.1890029907227 2017 87.7372589111328 2018 93.1007690429688 2019 91.2903366088867 2020 78.016487121582