user: Question: What is the average Year with a U.S. Christian that is 167?
Columns: ['Year', 'Album', 'U.S.', 'U.S. Christian', 'U.S. Indie']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1983.0, 'Sneak Preview (as Sneak Preview)', '—', '—', '—']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "U.S. Christian" = '167';