Frequencies for first 10,000 rows of exmwi22d variable in namcs2003 dataset :

       exam |
write-in #2 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,636       96.36       96.36
         49 |          1        0.01       96.37
         89 |        308        3.08       99.45
         91 |          1        0.01       99.46
         94 |         11        0.11       99.57
         95 |         41        0.41       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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