user: ### NOW ANSWER:
Question: What year was the No. 7 charts?
Columns: ['Year', 'Álbum', 'Charts', 'Sales', 'Certification']
Types: ['real', 'text', 'text', 'real', 'text']
Sample row: [1988.0, 'Super Xuxa Contra o Baixo Astral', 'No. 1', 100000.0, 'Gold']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Charts" = 'No. 7';