csvstat doen't give counts for some columns

Created by: nealmcb

csvstat is great, and usually gives a sense of the mode of the data, via a count of how many rows have the most frequent values:

 4. LAST_NAME
        
        Nulls: True
        Unique values: 307123
        5 most frequent values:
                SMITH:  28155
                JOHNSON:        23713
                MARTINEZ:       18465
                MILLER: 16916
                BROWN:  15428
        Max length: 28

But sometimes it doesn't, perhaps when there less than some predefined number of unique values:

28. STATUS
        
        Nulls: False
        Values: Active, Inactive

I'd like to get counts of the top 5 most frequent values for all columns, as long as there are any repeated values.