Frequencies for first 10,000 rows of prov6190 variable in pos2009 dataset :

       SRV: |
GERONTOLOGI |
        CAL |
  SPECIALTY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,333       13.33       99.71
          1 |         19        0.19       99.90
          2 |          6        0.06       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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