Frequencies for first 10,000 rows of prov2250 variable in pos1998 dataset :

       srv: |
    nursing |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,149       81.49       81.49
          1 |      1,741       17.41       98.90
          2 |         15        0.15       99.05
          3 |         95        0.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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