Frequencies for first 10,000 rows of prov2140 variable in pos2009 dataset :

       SRV: |
  EMERGENCY |
   SERVICES |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |        390        3.90       90.28
          1 |        657        6.57       96.85
          2 |        150        1.50       98.35
          3 |        165        1.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017