Frequencies for pmcarr_i1 variable in parkwork dataset :

       mcid |
    issuing |
  authority |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        928       81.91       81.91
          1 |          1        0.09       81.99
          5 |          1        0.09       82.08
          6 |          5        0.44       82.52
         10 |          1        0.09       82.61
         12 |          5        0.44       83.05
         15 |          1        0.09       83.14
         47 |          1        0.09       83.23
         51 |          1        0.09       83.32
         57 |        136       12.00       95.32
         58 |          1        0.09       95.41
         77 |         14        1.24       96.65
         88 |         24        2.12       98.76
         99 |         14        1.24      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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