Frequencies for first 10,000 rows of choice_list variable in icd9toicd10gem dataset :

Choice List |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,643       96.43       96.43
          1 |        238        2.38       98.81
          2 |        109        1.09       99.90
          3 |          7        0.07       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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