Frequencies for pmcarr_i1 variable in parkwork dataset :

       mcid |
    issuing |
  authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        904       83.01       83.01
          6 |          8        0.73       83.75
          8 |          1        0.09       83.84
         12 |          2        0.18       84.02
         13 |          1        0.09       84.11
         18 |          1        0.09       84.21
         25 |          1        0.09       84.30
         36 |          1        0.09       84.39
         37 |          1        0.09       84.48
         40 |          2        0.18       84.66
         51 |          2        0.18       84.85
         57 |         96        8.82       93.66
         77 |         27        2.48       96.14
         88 |         28        2.57       98.71
         99 |         14        1.29      100.00
------------+-----------------------------------
      Total |      1,089      100.00

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