Frequencies for first 10,000 rows of therpr22 variable in nhamcsopd1997 dataset :

      other |
  ther/prev |
 service #2 |
    - 2 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,964       99.64       99.64
         49 |          1        0.01       99.65
         86 |          4        0.04       99.69
         89 |          1        0.01       99.70
         90 |          1        0.01       99.71
         93 |          3        0.03       99.74
         94 |         15        0.15       99.89
         95 |          4        0.04       99.93
         96 |          4        0.04       99.97
         97 |          1        0.01       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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