Frequencies for first 10,000 rows of dctd_er_srvc_cd variable in pos2010 dataset :

       SRV: |
  EMERGENCY |
       DEPT |
(DEDICATED) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,626       86.26       86.26
          0 |      1,090       10.90       97.16
          1 |        206        2.06       99.22
          2 |         19        0.19       99.41
          3 |         59        0.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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