I have a list of postcodes that includes duplicates. I would like to find out how many instances of each postcode there are.
For example I would like this:
GL15
GL15
GL15
GL16
GL17
GL17
GL17
...to become this:
GL15 3
GL15 3
GL15 3
GL16 1
GL17 2
GL17 2
...or ideally this:
GL15 3
GL16 1
GL17 3
Thanks!