Frequencies for first 10,000 rows of prov6180 variable in pos2006 dataset :

       srv: |
  emergency |
       dept |
(dedicated) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,710       87.10       87.10
          0 |      1,189       11.89       98.99
          1 |         84        0.84       99.83
          2 |          5        0.05       99.88
          3 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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