user: Question: what's the percentage of votes with election date being 1981
Columns: ['Election date', 'Party leader', 'Number of votes received', 'Percentage of votes', 'Number of deputies']
Types: ['real', 'text', 'real', 'text', 'real']
Sample row: [1964.0, 'Habib Bourguiba', 1255153.0, '100%', 101.0]
SQL:

assistant: SELECT "Percentage of votes" FROM "Table" WHERE "Election date" = 1981.0;