Frequencies for first 10,000 rows of therpr23 variable in nhamcsopd1997 dataset :

      other |
  ther/prev |
 service #2 |
    - 3 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,964       99.64       99.64
        492 |          1        0.01       99.65
        862 |          2        0.02       99.67
        863 |          1        0.01       99.68
        865 |          1        0.01       99.69
        893 |          1        0.01       99.70
        909 |          1        0.01       99.71
        935 |          1        0.01       99.72
        936 |          1        0.01       99.73
        937 |          1        0.01       99.74
        940 |          1        0.01       99.75
        944 |         14        0.14       99.89
        951 |          1        0.01       99.90
        953 |          3        0.03       99.93
        960 |          1        0.01       99.94
        965 |          3        0.03       99.97
        978 |          1        0.01       99.98
        994 |          1        0.01       99.99
        995 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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