| Value |
Category |
| 0 |
NR |
| 1 |
Electricity |
| 2 |
Steam |
| 3 |
Diesel |
| 4 |
Others |
| 5 |
No motive power |
| 6 |
Closed factory |
| 9 |
Invalid |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.