Frequencies for first 10,000 rows of record_10 variable in linkco1991us_num dataset :

Record-Axis |
  Condition |
    Code 10 |
   (ICD 9th |
  Revision) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
       7834 |          1        0.01       99.99
        933 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015