Frequencies for first 10,000 rows of prov2250 variable in pos1997 dataset :

       srv: |
    nursing |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,199       81.99       81.99
          1 |      1,703       17.03       99.02
          2 |         15        0.15       99.17
          3 |         83        0.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016