Frequencies for first 10,000 rows of diagsc22 variable in namcs1995 dataset :

      other |
diag/screen |
 service #2 |
    - 2 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,994       99.94       99.94
         89 |          2        0.02       99.96
         90 |          1        0.01       99.97
         91 |          2        0.02       99.99
         96 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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