Frequencies for first 10,000 rows of exmwi13d variable in namcs2001 dataset :

       exam |
write-in #1 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      7,489       74.89       74.89
        803 |          1        0.01       74.90
        890 |          3        0.03       74.93
        891 |        210        2.10       77.03
        892 |        192        1.92       78.95
        893 |      1,688       16.88       95.83
        894 |          4        0.04       95.87
        896 |          1        0.01       95.88
        897 |          1        0.01       95.89
        903 |          3        0.03       95.92
        930 |          2        0.02       95.94
        941 |         98        0.98       96.92
        950 |        267        2.67       99.59
        951 |          1        0.01       99.60
        954 |         14        0.14       99.74
        999 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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