2.4 Teacher Profile and Quality 2.4.2 Average percentage of full-time teachers with Ph.D. during the last five years Ph.D Certificate A.Y. 2017-18 Ph.D Certificate A.Y. 2018-19 Ph.D Certificate A.Y. 2019-20 Ph.D Certificate A.Y. 2020-21 Ph.D Certificate A.Y. 2021-22