I wanted to say
The number of schools in the country is not enough. The government should build more schools to meet the demand and raise the quality of education.
by using the words sufficient or adequate. However, I couldn't reach any results with these words after Google search. I think these words are used to refer to the capacity of a specific school but not used to refer to the number of schools. Which words can I use to imply the meaning in my sentence instead of not enough.