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Mr. J. Enoch Powell
asked the Secretary of State for Northern Ireland what is, in percentage terms, the differential between the domestic and non-domestic regional rate in each of the years 1976–77 to 1979–80 and, estimated, for 1980–81.
Mr. Rossi
The information is as follows:
| Year | Domestic rate | Non-Domestic rate | Percentage differential |
| 1976–77 | 36p | 48p | 25 |
| 1977–78 | 41·7p | 53·7p | 22·3 |
| 1978–79 | 44·6p | 56·6p | 21·2 |
| 1979–80 | 48·8p | 60·8p | 19·7 |
| 1980–81 | 59·7p | 71·7p | 16·7 |