Frequencies for first 10,000 rows of prov6155 variable in pos2007 dataset :

       srv: |
  ambulance |
    (owned) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,257       12.57       99.39
          1 |         17        0.17       99.56
          2 |         41        0.41       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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