| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than 1 year | 30 |
0.4%
|
| 1 | 220 |
3.1%
|
|
| 2 | 732 |
10.4%
|
|
| 3 | 765 |
10.9%
|
|
| 4 | 840 |
12%
|
|
| 5 | 781 |
11.1%
|
|
| 6 | 632 |
9%
|
|
| 7 | 788 |
11.2%
|
|
| 8 | 606 |
8.6%
|
|
| 9 | 635 |
9.1%
|
|
| 10 | 214 |
3.1%
|
|
| 11 | 202 |
2.9%
|
|
| 12 | 555 |
7.9%
|
|
| 98 | don't know | 5 |
0.1%
|
| 99 | 5 |
0.1%
|
|
| 101 | .Z | 1222 |