user: Question: How many times was the vote percentage 15.0%?
Columns: ['Rank', 'Couple', 'Judges', 'Public', 'Total', 'Vote percentage', 'Result']
Types: ['real', 'text', 'real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 'Hayley and Daniel', 9.0, 9.0, 18.0, '33.1%', 'Safe']
SQL:

assistant: SELECT COUNT("Total") FROM "Table" WHERE "Vote percentage" = '15.0%';