| Value |
Category |
| 0 |
NR |
| 1 |
*100 or more workers |
| 2 |
CE |
| 3 |
Electricity |
| 4 |
Sample I |
| 5 |
Sample II |
| 6 |
B & C 100 or more workers |
| 7 |
B&C CE |
| 8 |
B & C Sample I |
| 9 |
B&C Sample II |
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.