Frequencies for first 10,000 rows of digsc12d variable in namcs2002 dataset :

Diag/Screen |
    service |
write-in #1 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      8,929       89.29       89.29
         03 |          1        0.01       89.30
         06 |          1        0.01       89.31
         14 |          1        0.01       89.32
         20 |          1        0.01       89.33
         21 |          1        0.01       89.34
         22 |          1        0.01       89.35
         31 |          1        0.01       89.36
         37 |          2        0.02       89.38
         38 |          1        0.01       89.39
         39 |          1        0.01       89.40
         45 |          5        0.05       89.45
         49 |          1        0.01       89.46
         57 |          1        0.01       89.47
         58 |          1        0.01       89.48
         60 |          1        0.01       89.49
         63 |          1        0.01       89.50
         67 |          1        0.01       89.51
         75 |          7        0.07       89.58
         78 |          1        0.01       89.59
         81 |         18        0.18       89.77
         86 |         38        0.38       90.15
         87 |         10        0.10       90.25
         88 |        157        1.57       91.82
         89 |        233        2.33       94.15
         90 |        101        1.01       95.16
         91 |         75        0.75       95.91
         92 |          9        0.09       96.00
         93 |         69        0.69       96.69
         94 |          3        0.03       96.72
         95 |        199        1.99       98.71
         96 |         13        0.13       98.84
         97 |          7        0.07       98.91
         99 |        109        1.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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