Frequencies for first 10,000 rows of digsc23d variable in namcs2004 dataset :

diag/screen |
    service |
write-in #2 |
  - 3 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,866       98.66       98.66
        097 |          1        0.01       98.67
        294 |          1        0.01       98.68
        802 |          1        0.01       98.69
        819 |          1        0.01       98.70
        861 |          1        0.01       98.71
        863 |          5        0.05       98.76
        887 |         16        0.16       98.92
        891 |         24        0.24       99.16
        892 |          5        0.05       99.21
        893 |         24        0.24       99.45
        894 |          7        0.07       99.52
        895 |          3        0.03       99.55
        902 |          2        0.02       99.57
        903 |          1        0.01       99.58
        913 |          1        0.01       99.59
        914 |          1        0.01       99.60
        915 |          1        0.01       99.61
        919 |          1        0.01       99.62
        922 |          1        0.01       99.63
        930 |          7        0.07       99.70
        939 |          1        0.01       99.71
        950 |          8        0.08       99.79
        954 |         11        0.11       99.90
        964 |          1        0.01       99.91
        992 |          3        0.03       99.94
        993 |          1        0.01       99.95
        995 |          2        0.02       99.97
        999 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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