| Value | Category | Cases | |
|---|---|---|---|
| -9 | Missing Data | 162 |
7.4%
|
| 1 | Annual | 412 |
18.9%
|
| 2 | Monthly | 1066 |
49%
|
| 3 | Both accurate | 255 |
11.7%
|
| 4 | Dont know | 280 |
12.9%
|
| Sysmiss | 1825 |