[mso] data is in one column - how do I get the % of each company represented?

Hi, 
Almost afraid to sound stupid here, but here goes... 
 
I have a large data file where one column has the names of many companies. I 
ran the sort on it but now I will like to get what is the % for each company 
represented.  This may be basic in excel, but new for me.  Do I have to rework 
the sheet somehow, or can I get this somehow just from the data in that one 
column?  A chart would also be good but I don't think I can achieve if the data 
is just left in the same column.
 
Maryann

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