| Average 1975 = 100 | ||
| (a) Output per head of the working population (1) (1975 =£3,567) | (b) Output per person employed (1975 = £3,711) | |
| 1964 | 82.9 | 80.9 |
| 1965 | 84.6 | 82.4 |
| 1966 | 85.8 | 83.7 |
| 1967 | 87.8 | 86.2 |
| 1968 | 91.9 | 90.3 |
| 1969 | 93.7 | 92.1 |
| 1970 | 95.5 | 94.1 |
| 1971 | 97.8 | 97.1 |
| 1972 | 100.0 | 99.5 |
| 1973 | 105.2 | 103.4 |
| 1974 | 102.7 | 101.2 |
| 1975 | 100.0 | 100.0 |
| 1976 | 101.2 | 102.6 |
| 1977 | 102.9 | 104.8 |
| 1978 | 105.8 | 107.5 |
| Average 1964 to 1978 | 95.8 | 95.1 |
§ (1) The working population is defined as employed labour force plus registered unemployed persons.