| Value |
Category |
| 1 |
Exploration |
| 2 |
Drilling technology |
| 3 |
Mining technology |
| 4 |
Inorganic materials and fertilizer production |
| 5 |
Electrification technology |
| 6 |
Plastic/rubber processing |
| 7 |
Operate chemical equipment |
| 8 |
Metal stamping |
| 9 |
Steel technology |
| 10 |
Blacksmith |
| 11 |
Repair of precision equipment |
| 12 |
Metal refining |
| 13 |
Electric technology (production and repair) |
| 14 |
Electricity operator (electricity generation plant) |
| 15 |
Electrical generator operator |
| 16 |
Operator and repair of furnace and turbine |
| 17 |
Electronic technology |
| 18 |
Construction technology |
| 19 |
Installation |
| 20 |
Construction material production |
| 21 |
Operate construction machinery |
| 22 |
Auto, bus driver |
| 23 |
Operate crane and forklift |
| 24 |
Railroad transportation |
| 25 |
Airline transportation |
| 26 |
Waterway transportation |
| 27 |
Diving |
| 28 |
Post office |
| 29 |
Telecommunication technology |
| 30 |
Weaving, knitting and dying |
| 31 |
Sewing |
| 32 |
Carpentry |
| 33 |
Shoemaking |
| 34 |
Ceramic and glass making |
| 35 |
Prosthetics manufacture |
| 36 |
Printing |
| 37 |
Agriculture product processing |
| 38 |
Foodstuff processing |
| 39 |
Alcohol, beer and other beverage manufacturing |
| 40 |
Sugar, candy and sweet manufacturing |
| 41 |
Industrial crop processing |
| 42 |
Food and beverage processing |
| 43 |
Hotel service |
| 44 |
Preservation and delivery of technical goods and materials |
| 45 |
Cultivation |
| 46 |
Livestock |
| 47 |
Medicine |
| 48 |
Pharmacy |
| 49 |
Buyer of goods |
| 50 |
Office clerk |
| 51 |
Broadcasting |
| 52 |
Musical instrument, cassette and record manufacturing |
| 53 |
Film and stage |
| 54 |
Photography |
| 55 |
Handicrafts |
| 56 |
Sports equipment manufacturing |
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.