user: Question: How many years are listed under joined for the Nor'easters?
Columns: ['Institution', 'Location', 'Founded', 'Type', 'Enrollment', 'Nickname', 'Joined']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'real']
Sample row: ['Curry College', 'Milton, Massachusetts', 1879.0, 'Private', 3182.0, 'Colonels', 1984.0]
SQL:

assistant: SELECT COUNT("Joined") FROM "Table" WHERE "Nickname" = 'Nor''easters';