Frequencies for first 10,000 rows of therpr12 variable in nhamcsopd1999 dataset :

      other |
  ther/prev |
 service #1 |
    - 2 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |      9,492       94.92       94.92
         21 |          1        0.01       94.93
         22 |          1        0.01       94.94
         33 |          1        0.01       94.95
         34 |          1        0.01       94.96
         36 |          2        0.02       94.98
         38 |          2        0.02       95.00
         45 |          2        0.02       95.02
         55 |          1        0.01       95.03
         57 |          4        0.04       95.07
         58 |          1        0.01       95.08
         59 |          2        0.02       95.10
         60 |          1        0.01       95.11
         69 |          3        0.03       95.14
         75 |          3        0.03       95.17
         78 |          1        0.01       95.18
         80 |          1        0.01       95.19
         81 |          1        0.01       95.20
         86 |          4        0.04       95.24
         89 |         30        0.30       95.54
         90 |          4        0.04       95.58
         91 |          4        0.04       95.62
         92 |          3        0.03       95.65
         93 |        108        1.08       96.73
         94 |        300        3.00       99.73
         95 |          4        0.04       99.77
         96 |          4        0.04       99.81
         97 |          3        0.03       99.84
         99 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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