เขาจบสกอร์เฉลี่ย 29.2 ได้กี่ปี?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many years did he have an average finish of 29.2?It is not neccessary to use all the tables.
 table_20686:  "Year" [ real]  "Starts" [ real]  "Wins" [ real]  "Winnings" [ text]  "Position" [ text]  "Team(s)" [ text] 
SELECT COUNT("Winnings") FROM table_20686 WHERE "Avg. Finish" = '29.2'