Frequencies for first 10,000 rows of nrsng_srvc_cd variable in pos2007 dataset :

       srv: |
    nursing |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,443       74.43       74.43
          0 |        136        1.36       75.79
          1 |      2,275       22.75       98.54
          2 |         13        0.13       98.67
          3 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017