NLRB Stats Archive › Annual Reports › FY1957 › Industrial distribution of unfair labor practice and representation cases received
Industrial distribution of unfair labor practice and representation cases received
| Industrial group 1 | All cases | Unfair labor practice cases | Unfair labor practice cases | Unfair labor practice cases | Unfair labor practice cases | Unfair labor practice cases | Representation cases | Representation cases | Representation cases | Representation cases |
|---|---|---|---|---|---|---|---|---|---|---|
| Industrial group 1 | All cases | All C cases | CA | CB | CC | CD | All R cases | RC | RM | RD |
| Total | 13,303 | 5,506 | 3,655 | 1,271 | 462 | 118 | 7,797 | 6,774 | 654 | 369 |
| Manufacturing | 8,038 | 2,886 | 2,230 | 477 | 153 | 26 | 5,152 | 4,544 | 344 | 264 |
| Manufacturing SIC subgroups detail (23 categories) | ||||||||||
| Agriculture, forestry, and fisheries | 9 | 6 | 3 | 2 | 1 | 0 | 3 | 2 | 1 | 0 |
| Mining | 197 | 88 | 72 | 14 | 1 | 1 | 109 | 95 | 11 | 3 |
| Construction | 963 | 820 | 309 | 327 | 119 | 75 | 133 | 120 | 12 | 1 |
| Wholesale trade | 1,107 | 365 | 242 | 61 | 58 | 4 | 742 | 660 | 57 | 25 |
| Retail trade | 1,094 | 337 | 253 | 57 | 23 | 4 | 757 | 666 | 60 | 31 |
| Finance, insurance, and real estate | 70 | 34 | 20 | 12 | 1 | 1 | 36 | 32 | 4 | 0 |
| Transportation, communication, and other public utilities | 1,476 | 815 | 426 | 287 | 95 | 7 | 661 | 540 | 91 | 30 |
| Services | 349 | 145 | 50 | 44 | 11 | 1 | 204 | 174 | 18 | 12 |
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Source data: U.S. NLRB Annual Reports (public domain). Reconstruction by NLRB Stats Archive. Updated June 2026.