Frequencies for first 10,000 rows of therpr13 variable in namcs2000 dataset :

      other |
  ther/prev |
 service #1 |
    - 3 dgt |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,639       96.39       96.39
        001 |         21        0.21       96.60
        061 |          1        0.01       96.61
        210 |          1        0.01       96.62
        452 |          5        0.05       96.67
        482 |          2        0.02       96.69
        494 |          1        0.01       96.70
        534 |          1        0.01       96.71
        753 |          1        0.01       96.72
        851 |          1        0.01       96.73
        852 |          1        0.01       96.74
        861 |          1        0.01       96.75
        862 |          2        0.02       96.77
        863 |          8        0.08       96.85
        890 |          4        0.04       96.89
        891 |          2        0.02       96.91
        893 |          8        0.08       96.99
        894 |          2        0.02       97.01
        897 |          1        0.01       97.02
        903 |          1        0.01       97.03
        922 |          2        0.02       97.05
        933 |          2        0.02       97.07
        935 |         38        0.38       97.45
        937 |          4        0.04       97.49
        939 |          8        0.08       97.57
        940 |          1        0.01       97.58
        944 |        221        2.21       99.79
        953 |          2        0.02       99.81
        963 |          1        0.01       99.82
        965 |          7        0.07       99.89
        978 |          1        0.01       99.90
        990 |          1        0.01       99.91
        992 |          1        0.01       99.92
        999 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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