Frequencies for first 10,000 rows of dctd_er_srvc_cd variable in pos2007 dataset :

       srv: |
  emergency |
       dept |
(dedicated) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,176       11.76       98.58
          1 |        110        1.10       99.68
          2 |          9        0.09       99.77
          3 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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