75% of youths complete high school in the normal amount of time (5 years). Source: Statistics Norway (SSB.NO) June 13th 2019.
From the summary: In 2012 the expected graduation rate from an upper secondary education reached 92% in Denmark (2014). Best info I could find in the time available.
of the population aged 14-17 years 45 per cent was enrolled in secondary schools (no year given. whole Kenya: 48% in 2009 - Worldbank https://data.worldbank.org/indicator/SE.SEC.NENR?locations=KE)
Source: Meru county Government - http://meru.go.ke/content.php?com=69&com2=73&com3=