Frequencies for first 10,000 rows of record_11 variable in linkco1991us_num dataset :

Record-Axis |
  Condition |
    Code 11 |
   (ICD 9th |
  Revision) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,999       99.99       99.99
       7991 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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