Frequencies for first 10,000 rows of therpr2r variable in namcs1998 dataset :

      other |
  ther/prev |
 service #2 |
  - numeric |
     recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,985       99.85       99.85
       5359 |          1        0.01       99.86
       5980 |          1        0.01       99.87
       8931 |          1        0.01       99.88
       8937 |          1        0.01       99.89
       8938 |          1        0.01       99.90
       8941 |          1        0.01       99.91
       9357 |          3        0.03       99.94
       9359 |          1        0.01       99.95
       9390 |          1        0.01       99.96
       9419 |          2        0.02       99.98
       9449 |          1        0.01       99.99
       9659 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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