Frequencies for first 10,000 rows of prov3510 variable in pos2009 dataset :

       SRV: |
XRAY-OFFSIT |
E-RESIDENTS |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |      1,725       17.25       93.82
          Y |        618        6.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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