that last row had an error of course....

This should be SO simple, but I just can't figure it out!
I've got a column in which each cell has a different list of numbers
separated by commas. I need to count how many numbers in a cell are greater
than or equal to 15:

4,14,16,15,15.3 -- 3
10,10.5,14.9 -- 0
19,15.1 --2

Anybody got any ideas??? Thanks for your help!