Frequencies for first 10,000 rows of prov3320 variable in pos2009 dataset :

       SRV: |
PHARMACY-ON |
SITE-RESIDE |
        NTS |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |        122        1.22       77.79
          Y |      2,221       22.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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