Frequencies for first 10,000 rows of prov2140 variable in pos1997 dataset :

       srv: |
  emergency |
services(or |
   ganized) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,792       87.92       87.92
          0 |        267        2.67       90.59
          1 |        694        6.94       97.53
          2 |        140        1.40       98.93
          3 |        107        1.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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