user: Question: In what year was there No competition for women?
Columns: ['Year', "Men's singles", "Women's singles", "Men's doubles", "Women's doubles", 'Mixed doubles']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2000', 'Boris Kessov', 'Petya Nedelcheva', 'Luben Panov Jassen Borissov', 'Petya Nedelcheva Diana Koleva', 'Slantchezar Tzankov Petya Nedelcheva']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Women's singles" = 'No competition';