| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3291 |
19.7%
|
|
| 1 | < 2 years | 7647 |
45.8%
|
| 2 | 2 years | 3384 |
20.3%
|
| 3 | 3 years | 1253 |
7.5%
|
| 4 | 4+ years | 1125 |
6.7%
|