user: Question: How many seasons have points totals of N/A?
Columns: ['Season', 'Series', 'Team', 'Races', 'Wins', 'Poles', 'F/Laps', 'Podiums', 'Points', 'Position']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real', 'real', 'text', 'text']
Sample row: [2009.0, 'Formula Renault 2.0 NEC', 'Motopark Academy', 16.0, 1.0, 1.0, 1.0, 1.0, '113', '15th']
SQL:

assistant: SELECT COUNT("Season") FROM "Table" WHERE "Points" = 'N/A';