user: Question: How many years have a weeks at #1 value of exactly 8?
Columns: ['Artist', 'Country', 'Number-one single(s)', 'Year', 'Weeks at #1', 'Straight to #1 ?']
Types: ['text', 'text', 'text', 'real', 'real', 'text']
Sample row: ['East 17', 'United Kingdom', '" It\'s Alright "', 1994.0, 1.0, 'No']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Weeks at #1" = 8.0;