Frequencies for first 10,000 rows of prov3495 variable in pos1992 dataset :

       srv: |
   clinical |
lab-offsite |
  -resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,366       73.66       73.66
          N |      2,082       20.82       94.48
          Y |        552        5.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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