user: Question: What was the percentage of national votes for Mahmoud Ahmadinejad?
Columns: ['Candidates', 'Votes Khuzestan', '% of votes Khuzestan', 'Votes Nationally', '% of votes nationally']
Types: ['text', 'real', 'text', 'real', 'text']
Sample row: ['Akbar Hashemi Rafsanjani', 319883.0, '20.50', 6211937.0, '21.13']
SQL:

assistant: SELECT "% of votes nationally" FROM "Table" WHERE "Candidates" = 'Mahmoud Ahmadinejad';