1931 Census of England and Wales, General Report, Table 59 : " Coal and Shale Miners: Occupational Distribution in Certain Counties".

  England and Wales Cumberland Derbyshire Durham Lancashire Northumberland Nottinghamshire Staffordshire Warwickshire Yorks, West Riding Carmarthenshire Denbighshire Glamorganshire Monmouthshire
Number of men in coal and shale mines (thousands) 892 10 57 143 81 48 52 55 15 171 13 11 135 53
Total in coal and shale mines 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000
140 Owners, agents, managers 4 5 4 3 7 4 3 4 5 4 6 3 4 4
041 Subordinate superintending staff 40 38 51 48 35 51 53 32 63 41 22 21 27 30
042 Hewers and getters 493 562 524 397 412 393 530 521 469 499 543 553 549 603
043 Persons conveying material to the shafts 179 120 170 202 227 195 169 176 137 209 121 170 144 116
044 Persons making and repairing roads 74 112 72 81 44 98 64 70 128 72 79 90 78 64
047 Other workers below ground 96 52 45 157 149 141 56 62 37 57 103 52 110 101
049 Other workers above ground 114 111 134 112 126 118 125 135 161 118 126 111 88 82