Frequencies for first 10,000 rows of prov2530 variable in pos1996 dataset :

      spec: |
    urology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,497       94.97       94.97
          N |        324        3.24       98.21
          Y |        179        1.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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