Frequencies for first 10,000 rows of prov3500 variable in pos2009 dataset :

       SRV: |
XRAY-ONSITE |
 -RESIDENTS |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |        504        5.04       81.61
          Y |      1,839       18.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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