user: Question: How many different popular vote counts were there for the candidate Rick Perry?
Columns: ['Candidate', 'Office', 'Home state', 'Popular vote', 'States – first place', 'States – second place', 'States – third place']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'text']
Sample row: ['Jon Huntsman', 'Former Governor', 'Utah', 83173.0, 0.0, 0.0, '1 New Hampshire']
SQL:

assistant: SELECT COUNT("Popular vote") FROM "Table" WHERE "Candidate" = 'Rick Perry';