Frequencies for first 10,000 rows of prov2250 variable in pos2006 dataset :

       srv: |
    nursing |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,533       75.33       75.33
          0 |        136        1.36       76.69
          1 |      2,182       21.82       98.51
          2 |         13        0.13       98.64
          3 |        136        1.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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