Frequencies for first 10,000 rows of therpr22 variable in nhamcsopd2000 dataset :

      other |
  ther/prev |
 service #2 |
    - 2 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,969       99.69       99.69
         57 |          1        0.01       99.70
         86 |          2        0.02       99.72
         91 |          1        0.01       99.73
         93 |         19        0.19       99.92
         94 |          3        0.03       99.95
         95 |          2        0.02       99.97
         96 |          2        0.02       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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