| Oil and gas extraction and mining, total | 21 272 | 33 483 | 29 194 | 3 956 | 333 | 2 667 | 
 |  |  |  |  |  |  |  | 
 | Oil and gas extraction | 19 377 | 34 922 | 30 179 | 4 393 | 350 | 2 793 | 
 | Senior officials and managers | 1 714 | 53 281 | 47 928 | 4 437 | 916 | 1 088 | 
 | Professionals | 4 632 | 40 644 | 37 278 | 2 951 | 415 | 2 276 | 
 | Technicians and assosiated professionals | 4 563 | 33 497 | 27 217 | 5 969 | 310 | 3 620 | 
 | Clerks, service workers and market sales workers | 2 100 | 25 380 | 23 224 | 2 015 | 141 | 2 136 | 
 | Craft, mobile-plant operators and drivers etc. | 4 699 | 29 088 | 23 617 | 5 365 | 106 | 3 615 | 
 | Other occupations | 1 669 | 32 495 | 27 597 | 4 231 | 666 | 2 160 | 
 |  |  |  |  |  |  |  | 
 | Mining | 1 895 | 23 070 | 22 065 | 793 | 212 | 1 757 | 
 | Senior officials and managers | 142 | 34 256 | 33 682 | 220 | 353 | 754 | 
 | Technicians, assosiated professionals and professionals | 113 | 29 387 | 28 827 | 297 | 263 | 434 | 
 | Clerks, service workers and market sales workers | 110 | 21 612 | 21 339 | 149 | 124 | 731 | 
 | Craft, mobile-plant operators and drivers etc. | 1 366 | 21 649 | 20 454 | 980 | 215 | 2 143 | 
 | Other occupations | 164 | 19 794 | 19 062 | 670 | 61 | 1 303 | 
 |  |