mobile phones' consumers diferenses

Please indicate your year at university (1,2,3,4,etc):

  1. 3
  2. 2
  3. 2
  4. 1 (why there is no such an answer like N/A - if I do not want to answer or I do not have information
  5. 3
  6. 2
  7. 1
  8. 5
  9. 2
  10. 4