Frequencies for first 10,000 rows of examwi2r variable in namcs2003 dataset :

       exam |
write-in #2 |
   - recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,636       96.36       96.36
       4939 |          1        0.01       96.37
       8913 |          3        0.03       96.40
       8915 |          3        0.03       96.43
       8926 |         44        0.44       96.87
       8934 |         28        0.28       97.15
       8936 |         51        0.51       97.66
       8939 |        179        1.79       99.45
       9139 |          1        0.01       99.46
       9411 |          3        0.03       99.49
       9419 |          8        0.08       99.57
       9509 |         41        0.41       99.98
       9999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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