Frequencies for first 10,000 rows of examwi1r variable in namcs2004 dataset :

       exam |
write-in #1 |
   - recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,555       75.55       75.55
        941 |          1        0.01       75.56
       3780 |          1        0.01       75.57
       3794 |          1        0.01       75.58
       3899 |          1        0.01       75.59
       6493 |          1        0.01       75.60
       8626 |          1        0.01       75.61
       8909 |          2        0.02       75.63
       8913 |        166        1.66       77.29
       8915 |          3        0.03       77.32
       8924 |          3        0.03       77.35
       8926 |        191        1.91       79.26
       8931 |          6        0.06       79.32
       8934 |        115        1.15       80.47
       8936 |        164        1.64       82.11
       8937 |          1        0.01       82.12
       8939 |      1,431       14.31       96.43
       8945 |          1        0.01       96.44
       8952 |          1        0.01       96.45
       8970 |          2        0.02       96.47
       9029 |          1        0.01       96.48
       9182 |          1        0.01       96.49
       9309 |          1        0.01       96.50
       9411 |         73        0.73       97.23
       9419 |          8        0.08       97.31
       9449 |          1        0.01       97.32
       9502 |          2        0.02       97.34
       9504 |          1        0.01       97.35
       9505 |          1        0.01       97.36
       9509 |        240        2.40       99.76
       9512 |          2        0.02       99.78
       9541 |          3        0.03       99.81
       9547 |          6        0.06       99.87
       9999 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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