Frequencies for first 10,000 rows of prov2260 variable in pos1993 dataset :

      spec: |
obstetrics/ |
 gynecology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,608       96.08       96.08
          N |        236        2.36       98.44
          Y |        156        1.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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