0	Pre-school/Kindergarten
1	Class one completed
2	Class two completed
3	Class three completed
4	Class four completed
5	Class five completed
6	Class six completed
7	Class seven completed
8	Class eight completed
9	Class nine completed
10	Class ten completed
11	Class eleven completed
12	Class twelve completed
13	Lower Secondary school certificate
14	Upper secondary school certificate
15	Technical/vocational pre-secondary diploma/certificate
16	Technical/vocational post-secondary diploma/certificate
17	College/university undergraduate
18	Bachelor degree (B.A., BSc, etc.)
19	Masters degree (M.A., MSc, etc)
20	Doctorate degree (PhD)
21	Other
88	No class completed
98	Don't know
