user: Question: When the United States had a total score of 274 what was the average year?
Columns: ['Year', 'Country', 'Champion', 'Total score', 'To Par [a ]']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1934.0, 'United States', 'Horton Smith Category:Articles with hCards', '284', '−4']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Total score" = '274' AND "Country" = 'United States';