| Value | Category | Cases | |
|---|---|---|---|
| 1 | Upto 1950 | 7180 |
12.3%
|
| 2 | 1951-1955 | 2358 |
4%
|
| 3 | 1956-1960 | 4412 |
7.5%
|
| 4 | 1961-1965 | 6298 |
10.8%
|
| 5 | 1966-1970 | 7657 |
13.1%
|
| 6 | 1971-1975 | 23894 |
40.8%
|
| 7 | 1976-1980 | 6704 |
11.5%
|