| Value | Category | Cases | |
|---|---|---|---|
| -8 | Don't know | 63 |
1.2%
|
| 0 | Less than a year | 91 |
1.7%
|
| 1 | 1-3 Years | 494 |
9.4%
|
| 2 | 4-10 Years | 1090 |
20.8%
|
| 3 | 11-50 Years | 714 |
13.6%
|
| 4 | 51-100 Years | 145 |
2.8%
|
| 5 | More than 100 Years | 57 |
1.1%
|
| 99 | Forever | 2590 |
49.4%
|