Frequencies for first 10,000 rows of exmwi12d variable in namcs2003 dataset :

       exam |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      7,117       71.17       71.17
         03 |          1        0.01       71.18
         45 |          1        0.01       71.19
         68 |          1        0.01       71.20
         79 |          1        0.01       71.21
         89 |      2,381       23.81       95.02
         90 |          1        0.01       95.03
         91 |          1        0.01       95.04
         92 |          1        0.01       95.05
         93 |         13        0.13       95.18
         94 |         42        0.42       95.60
         95 |        436        4.36       99.96
         99 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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