user: Question: What is the total number of Week(s), when Attendance is 61,603?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Bye', 'Bye', 'Bye', 'Bye']
SQL:

assistant: SELECT COUNT("Week") FROM "Table" WHERE "Attendance" = '61,603';