More on survey

Today, I continue on surveying. Sadly, I only get 4 people to survey.

So far, here are the data of people who I surveyed.
13 years old: 2 people
14 years old: 4 people
15 years old: 4 people
16 years old: 3 people
17 years old: 3 people

So, I think I'm done surveying people at the age of 15 and need to do more work with other year level.

Evidence:
*Here are the pictures of the people who answer the questionnaires.