CREATE TABLE table_62620 ("Year" FLOAT, "Team" TEXT, "Co-Drivers" TEXT, "Class" TEXT, "Laps" FLOAT, "Pos." TEXT, "Class Pos." TEXT)

In what year did the team of aston martin racing have a position of 6th?
SELECT COUNT("Year") FROM table_62620 WHERE "Team" = 'aston martin racing' AND "Pos." = '6th'
SELECT COUNT("Year") FROM "table_62620" WHERE "Pos." = '6th' AND "Team" = 'aston martin racing'