Frequencies for first 10,000 rows of exmwi13d variable in namcs2003 dataset :

       exam |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      7,117       71.17       71.17
        033 |          1        0.01       71.18
        451 |          1        0.01       71.19
        681 |          1        0.01       71.20
        799 |          1        0.01       71.21
        890 |          2        0.02       71.23
        891 |        369        3.69       74.92
        892 |        244        2.44       77.36
        893 |      1,766       17.66       95.02
        903 |          1        0.01       95.03
        914 |          1        0.01       95.04
        920 |          1        0.01       95.05
        930 |         13        0.13       95.18
        940 |          1        0.01       95.19
        941 |         41        0.41       95.60
        950 |        427        4.27       99.87
        954 |          9        0.09       99.96
        999 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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