Rating Field

In a table I have an unlimited number of items - each unique item has it's own unique ID. One of the fields in the table is a Rating field. The table stores records submitted by users for items that they Rate (on a scale of 1 - 5, with values of 10,20,30,40 or 50 inserted in the db). I would like to sort this info and display the five most favorite items among users via the rating scale. In other words the five unique items that have been rated 50 (best) most often.
I'm able to create a record set of all unique items that carry a 50 rating using the statement:
strRated="Select DISTINCT RList.BID FROM RLIST where RList.Rating=50". How do I then use this record set to find the ID's of the five items that are rated most often with the 50 rating and then display those?
Originally, I thought I could use the values 10,20,30,40 or 50 to calculate an average or a total among these records and then display the items with the hightest calculation. At least that was the intention - though I do not know exacly how to accomplish this either.