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Mr. Trotter
asked the Secretary of State for Defence what percentage of the defence budget has been spent on (a) research, and (b) development of approach systems in each of the last 10 years; and what has been the actual expenditure in each case at 1977 of the last 10 years; and what has been the actual expenditure in each case at 1977–78 prices.
Dr. Gilbert
The figures for research and development on instrument and visual approach landing systems are:in each year from 1963–64 to 1976–77 is as follows at the prices ruling at the time:
| £ million | |
| 1963–64 | 118 |
| 1964–65 | 121 |
| 1965–66 | 128 |
| 1966–67 | 152 |
| 1967–68 | 165 |
| 1968–69 | 214 |
| 1969–70 | 227 |
| 1970–71 | 235 |
| 1971–72 | 242 |
| 1972–73 | 257 |
| 1973–74 | 425 |
| 1974–75 | 468 |
| 1975–76 | 530 |
| 1976–77(provisional) | 670 |
Figures for years before 1963–64 are not readily available and could only be provided with disproportionate effort.