Frequencies for first 10,000 rows of prov2005 variable in pos1995 dataset :

 620   oral |
  pathology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,884       88.84       88.84
          N |        896        8.96       97.80
          Y |        220        2.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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