| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 73 |
1.8%
|
| 2 | 6-12 months | 64 |
1.6%
|
| 3 | More than 1 year but less than 2 years | 75 |
1.8%
|
| 4 | 2 or more years but less than 5 years | 121 |
3%
|
| 5 | 5 or more years | 171 |
4.2%
|
| 6 | Never | 3565 |
87.6%
|