Year % of total teachers 1999 85.891242980957 2000 86.6686477661133 2001 87.9305419921875 2002 88.7760925292969 2005 82.0886993408203 2006 87.1140899658203 2007 81.2531204223633 2015 100 2016 88.8648986816406 2022 85.8327331542969 2023 97.5670013427734