| | | 115310 | Support Activities for
Forestry | 6 | Support Activities for
Forestry 115310 | Support Activities for
Forestry 11531 | Support Activities for
Forestry 1153 | Support Activities for
Agriculture and Forestry 115 | Agriculture, Forestry,
Fishing and Hunting 11 |
| | | 21 | Mining, Quarrying, and
Oil and Gas Extraction | 2 | | | | | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 211 | Oil and Gas Extraction | 3 | | | | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 2111 | Oil and Gas Extraction | 4 | | | Oil and Gas Extraction 2111 | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 21112 | Crude Petroleum
Extraction | 5 | | Crude Petroleum
Extraction 21112 | Oil and Gas Extraction 2111 | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 211120 | Crude Petroleum
Extraction | 6 | Crude Petroleum
Extraction 211120 | Crude Petroleum
Extraction 21112 | Oil and Gas Extraction 2111 | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 21113 | Natural Gas Extraction | 5 | | Natural Gas Extraction 21113 | Oil and Gas Extraction 2111 | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 211130 | Natural Gas Extraction | 6 | Natural Gas Extraction 211130 | Natural Gas Extraction 21113 | Oil and Gas Extraction 2111 | Oil and Gas Extraction 211 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 212 | Mining (except Oil and
Gas) | 3 | | | | Mining (except Oil and
Gas) 212 | Mining, Quarrying, and
Oil and Gas Extraction 21 |
| | | 2121 | Coal Mining | 4 | | | Coal Mining 2121 | Mining (except Oil and
Gas) 212 | Mining, Quarrying, and
Oil and Gas Extraction 21 |