Literal question
For persons over 6 years of age
[Questions 5.2 to 5.10 were asked for persons over 6 years of age.]
5.3 Indicate duration of course
[Question 5.3 was asked of persons with a secondary school diploma obtained at a professional institute, teacher's schools, or institute of arts per question 5.2]
[] 1 2-3 years
[] 2 4-5 years