| Value | Category | Cases | |
|---|---|---|---|
| 1 | Upto 1950 | 7603 |
13.5%
|
| 2 | 1951-1955 | 2511 |
4.4%
|
| 3 | 1956-1960 | 4625 |
8.2%
|
| 4 | 1961-1965 | 6688 |
11.8%
|
| 5 | 1966-1970 | 7919 |
14%
|
| 6 | 1971-1975 | 21737 |
38.5%
|
| 7 | 1976-1980 | 5377 |
9.5%
|