Frequencies for b_1_c21_95 variable in hcris2552_10_2017 dataset :

  ambulance |
   services |
    b000001 |
09500 02100 |      Freq.     Percent        Cum.
------------+-----------------------------------
       3491 |          1        0.03        0.03
      13049 |          1        0.03        0.05
     145247 |          1        0.03        0.08
    1810748 |          1        0.03        0.11
    5653134 |          1        0.03        0.13
          . |      3,744       99.87      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2018