How effective is the High Tech High School in creating free websites to show student work?

How many students at High Tech High School have digital portfolios?
Let's look at the class of 2017.  LINK

   30 students

  29 students

 28 students

 28 students

  25 students

That's a total of 137 students in the senior class.   

The school has 570 students enrolled in four grades, so about 140 students per grade.

We can assume that more than 90% of the students (137 out of 140 students) at High Tech High have a digital portfolio.