Year % of total secondary 1999 26.2212009429932 2001 28.8274307250977 2002 30.3576507568359 2003 31.6913394927979 2004 32.2669715881348 2005 32.1766395568848 2006 33.4410705566406 2007 34.225170135498 2008 37.8003807067871 2009 38.4401702880859 2010 38.6033897399902 2011 39.62255859375 2012 41.2410011291504 2013 42.791690826416 2014 43.9694290161133 2015 45.914379119873 2016 47.6836204528809 2017 48.1502685546875 2018 49.181209564209 2019 46.4952392578125 2020 46.9245986938477 2021 47.522029876709 2022 48.6759300231934