Frequencies for first 10,000 rows of examwi2r variable in nhamcsopd2002 dataset :

       exam |
write-in #2 |
   - recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,613       96.13       96.13
       7534 |          1        0.01       96.14
       8913 |          7        0.07       96.21
       8926 |        132        1.32       97.53
       8931 |          1        0.01       97.54
       8934 |         18        0.18       97.72
       8935 |          1        0.01       97.73
       8936 |         48        0.48       98.21
       8939 |        131        1.31       99.52
       8954 |          1        0.01       99.53
       9408 |          1        0.01       99.54
       9509 |         42        0.42       99.96
       9547 |          3        0.03       99.99
       9999 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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