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

       SRV: |
  EMERGENCY |
       DEPT |
(DEDICATED) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,115       11.15       97.53
          1 |        186        1.86       99.39
          2 |         11        0.11       99.50
          3 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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