| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't Know (Spontaneous) | 2 |
6.3%
|
| 1 | Standard for total energy use | 15 |
46.9%
|
| 2 | Standard for energy use relative to output | 6 |
18.8%
|
| 3 | Standard for energy use relative to other parameters | 9 |
28.1%
|
| Sysmiss | 329 |