Frequencies for first 10,000 rows of proc62d variable in namcs2011 dataset :

Procedure 6 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,968       99.68       99.68
         49 |          1        0.01       99.69
         86 |          1        0.01       99.70
         89 |         26        0.26       99.96
         92 |          2        0.02       99.98
         95 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016