Frequencies for first 10,000 rows of prov3505 variable in pos1995 dataset :

       srv: |
xray-onsite |
       -non |
  residents |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,523       75.23       75.23
          N |      2,421       24.21       99.44
          Y |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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