Frequencies for first 10,000 rows of prov2140 variable in pos1991 dataset :

       srv: |
  emergency |
services(or |
   ganized) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |        272        2.72       90.42
          1 |        753        7.53       97.95
          2 |        108        1.08       99.03
          3 |         97        0.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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