| AÑOS | Imposiciones | Reintegros |
| Número | Número | |
| 1975 | 3.572 | 3.885 |
| 1976 | 4.326 | 4.972 |
| 1977 | 5.121 | 6.167 |
| 1978 | 6.389 | 8.368 |
| 1979 | 8.642 | 13.983 |
| 1980 | 11.197 | 18.391 |
| AÑOS | Pesetas | Pesetas |
| 1975 | 55.703.829 | 50.507.716 |
| 1976 | 78.782.382 | 67.708.716 |
| 1977 | 122.215.761 | 72.551.671 |
| 1978 | 228.041.409 | 149.671.440 |
| 1979 | 398.271.409 | 299.671.440 |
| 1980 | 550.845.596 | 482.095.822 |