user: Question: How many years have a 4th Day of bumped wolfson?
Columns: ['Year', 'Finish position', '1st day', '2nd day', '3rd day', '4th Day']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2008.0, '57th', 'rowed-over', 'rowed-over', 'rowed-over', 'rowed-over']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "4th Day" = 'bumped wolfson';