Frequencies for pmcarr_i1 variable in parkwork dataset :

       mcid |
    issuing |
  authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        969       84.55       84.55
          6 |          8        0.70       85.25
          8 |          1        0.09       85.34
         10 |          1        0.09       85.43
         12 |          3        0.26       85.69
         13 |          1        0.09       85.78
         15 |          1        0.09       85.86
         32 |          1        0.09       85.95
         37 |          1        0.09       86.04
         48 |          2        0.17       86.21
         57 |        102        8.90       95.11
         77 |         17        1.48       96.60
         88 |         28        2.44       99.04
         99 |         11        0.96      100.00
------------+-----------------------------------
      Total |      1,146      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016