What is the average year in which the finish position was 13th?
CREATE TABLE table_name_30 (year INTEGER, position VARCHAR)
SELECT AVG(year) FROM table_name_30 WHERE position = "13th"
### Context: CREATE TABLE table_name_30 (year INTEGER, position VARCHAR) ### Question: What is the average year in which the finish position was 13th? ### Answer: SELECT AVG(year) FROM table_name_30 WHERE position = "13th"