CREATE TABLE table_80225 ("Name" TEXT, "Gender" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT, "Roll" FLOAT)

What was the decile of Samuel Marsden Collegiate School in Whitby, when it had a roll higher than 163?
SELECT COUNT("Decile") FROM table_80225 WHERE "Area" = 'whitby' AND "Name" = 'samuel marsden collegiate school' AND "Roll" > '163'
SELECT COUNT("Decile") FROM "table_80225" WHERE "Area" = 'whitby' AND "Name" = 'samuel marsden collegiate school' AND "Roll" > '163'