Frequencies for first 10,000 rows of nrsng_srvc_cd variable in pos1994 dataset :

       srv: |
    nursing |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,542       85.42       85.42
          1 |      1,393       13.93       99.35
          2 |         13        0.13       99.48
          3 |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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