| Value | Category | Cases | |
|---|---|---|---|
| 1 | N0 | 7 |
3.7%
|
| 2 | N1 | 44 |
23.3%
|
| 3 | N2 | 50 |
26.5%
|
| 4 | N3 | 22 |
11.6%
|
| 5 | NX | 25 |
13.2%
|
| 6 | Not available, Non-applicable | 41 |
21.7%
|