Counting unique comma-delimited values in a text field

Hi list,

I have a table where multiple values are stored in a delimited string
field. Values look like:

Joe
Joe,Frank,John
John,Frank
Frank
Joe,Frank
John

I need to generate aggregate results like:

Joe: 3
Frank: 4
John: 3

The table design in this case is fixed so and this is what I've tried so
far:

SELECT count(theAnswer), theAnswer
FROM (SELECT unnest(string_to_array(answer, ',')) AS theAnswer
FROM Answers) AS theAnswer
GROUP BY theAnswer

This seems to work - any gotchas I might be overlooking or a better way
of finding the totals?

Thanks,

Brian