Frequencies for first 10,000 rows of prov6190 variable in pos2008 dataset :

       srv: |
gerontologi |
        cal |
  specialty |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,325       13.25       99.80
          1 |         16        0.16       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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