List showing running total of instances

[Pie_Fun]

Hi Folks,

to try and explain what I'm trying to do
Say I have a list of numbers
48,52,55,48,52,55,60,62,48
what I want is a corresponding list with the number of instances that a number has appeared to that point in the list.
so it would be
1,1,1,2,2,2,1,1,3

Thanks for any feedback