CREATE TABLE table_23530 ("Pos" FLOAT, "Driver" CLOB, "Vehicle" CLOB, "Top 13 Time" CLOB, "Shoot-Out Time" CLOB, "Best Time of Day" CLOB)

how many vehicles where top 13 time is 1:18.72
SELECT COUNT("Vehicle") FROM table_23530 WHERE "Top 13 Time" = '1:18.72'
SELECT COUNT("Vehicle") FROM "table_23530" WHERE "Top 13 Time" = '1:18.72'