Frequencies for first 10,000 rows of examwi1r variable in namcs2001 dataset :

       exam |
write-in #1 |
   - recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,489       74.89       74.89
       8039 |          1        0.01       74.90
       8904 |          1        0.01       74.91
       8905 |          1        0.01       74.92
       8908 |          1        0.01       74.93
       8913 |        210        2.10       77.03
       8926 |        192        1.92       78.95
       8931 |          1        0.01       78.96
       8934 |        171        1.71       80.67
       8936 |        205        2.05       82.72
       8937 |          2        0.02       82.74
       8939 |      1,309       13.09       95.83
       8945 |          4        0.04       95.87
       8962 |          1        0.01       95.88
       8970 |          1        0.01       95.89
       9039 |          3        0.03       95.92
       9304 |          2        0.02       95.94
       9411 |         45        0.45       96.39
       9419 |         53        0.53       96.92
       9505 |          2        0.02       96.94
       9509 |        265        2.65       99.59
       9512 |          1        0.01       99.60
       9543 |          2        0.02       99.62
       9547 |         12        0.12       99.74
       9999 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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