Frequencies for first 10,000 rows of exmwi13d variable in namcs2004 dataset :

       exam |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      7,555       75.55       75.55
        094 |          1        0.01       75.56
        378 |          1        0.01       75.57
        379 |          1        0.01       75.58
        389 |          1        0.01       75.59
        649 |          1        0.01       75.60
        862 |          1        0.01       75.61
        890 |          2        0.02       75.63
        891 |        169        1.69       77.32
        892 |        194        1.94       79.26
        893 |      1,717       17.17       96.43
        894 |          1        0.01       96.44
        895 |          1        0.01       96.45
        897 |          2        0.02       96.47
        902 |          1        0.01       96.48
        918 |          1        0.01       96.49
        930 |          1        0.01       96.50
        941 |         81        0.81       97.31
        944 |          1        0.01       97.32
        950 |        244        2.44       99.76
        951 |          2        0.02       99.78
        954 |          9        0.09       99.87
        999 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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