Frequencies for first 10,000 rows of prov3505 variable in pos1993 dataset :

       srv: |
xray-onsite |
       -non |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,627       76.27       76.27
          N |      2,321       23.21       99.48
          Y |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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