| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than 1 year | 51 |
12.5%
|
| 1 | 53 |
13%
|
|
| 2 | 97 |
23.7%
|
|
| 3 | 59 |
14.4%
|
|
| 4 | 37 |
9%
|
|
| 5 | 31 |
7.6%
|
|
| 6 | 11 |
2.7%
|
|
| 7 | 17 |
4.2%
|
|
| 8 | 14 |
3.4%
|
|
| 9 | 3 |
0.7%
|
|
| 10 | 15 |
3.7%
|
|
| 12 | 8 |
2%
|
|
| 13 | 1 |
0.2%
|
|
| 15 | 2 |
0.5%
|
|
| 16 | 2 |
0.5%
|
|
| 17 | 5 |
1.2%
|
|
| 18 | 1 |
0.2%
|
|
| 20 | 2 |
0.5%
|
|
| Sysmiss | 1871 |