Frequencies for first 10,000 rows of exmwi22d variable in namcs2002 dataset :

       Exam |
write-in #2 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,647       96.47       96.47
         89 |        337        3.37       99.84
         93 |          9        0.09       99.93
         94 |          4        0.04       99.97
         95 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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