Frequencies for first 10,000 rows of digsc22d variable in namcs2004 dataset :

diag/screen |
    service |
write-in #2 |
  - 2 digit |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,866       98.66       98.66
         09 |          1        0.01       98.67
         29 |          1        0.01       98.68
         80 |          1        0.01       98.69
         81 |          1        0.01       98.70
         86 |          6        0.06       98.76
         88 |         16        0.16       98.92
         89 |         63        0.63       99.55
         90 |          3        0.03       99.58
         91 |          4        0.04       99.62
         92 |          1        0.01       99.63
         93 |          8        0.08       99.71
         95 |         19        0.19       99.90
         96 |          1        0.01       99.91
         99 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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