human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name, Gender, Area, Authority, Decile, Roll
###Question: What was the decile of Samuel Marsden Collegiate School in Whitby, when it had a roll higher than 163?
gpt
SELECT COUNT Decile FROM table WHERE Area = whitby AND Name = samuel marsden collegiate school AND Roll > 163