| Value | Category | Cases | |
|---|---|---|---|
| 1 | EachMonth | 44 |
21.8%
|
| 2 | EachQuarter | 72 |
35.6%
|
| 3 | EachSixMos | 41 |
20.3%
|
| 4 | EachYear | 45 |
22.3%
|
| Missing value | 2006 |