Frequencies for first 10,000 rows of flags variable in icd10cmtoicd9gem dataset :

   All five |
      flags |      Freq.     Percent        Cum.
------------+-----------------------------------
      00000 |      1,591       15.91       15.91
      10000 |      7,524       75.24       91.15
      10111 |        432        4.32       95.47
      10112 |        411        4.11       99.58
      10113 |         30        0.30       99.88
      10121 |          3        0.03       99.91
      10122 |          3        0.03       99.94
      10131 |          2        0.02       99.96
      10132 |          2        0.02       99.98
      10141 |          1        0.01       99.99
      10142 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 May 2016