Frequencies for first 10,000 rows of therpr23 variable in nhamcsopd2000 dataset :

      other |
  ther/prev |
 service #2 |
    - 3 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,969       99.69       99.69
        579 |          1        0.01       99.70
        862 |          2        0.02       99.72
        914 |          1        0.01       99.73
        935 |          7        0.07       99.80
        938 |         12        0.12       99.92
        944 |          3        0.03       99.95
        951 |          1        0.01       99.96
        954 |          1        0.01       99.97
        963 |          1        0.01       99.98
        965 |          1        0.01       99.99
        990 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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