Frequencies for first 10,000 rows of age variable in nhamcsopd1992 dataset :

Patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        477        4.77        4.77
          1 |        266        2.66        7.43
          2 |        175        1.75        9.18
          3 |        131        1.31       10.49
          4 |        128        1.28       11.77
          5 |        122        1.22       12.99
          6 |         72        0.72       13.71
          7 |         75        0.75       14.46
          8 |         71        0.71       15.17
          9 |         63        0.63       15.80
         10 |         74        0.74       16.54
         11 |         77        0.77       17.31
         12 |         49        0.49       17.80
         13 |         67        0.67       18.47
         14 |         64        0.64       19.11
         15 |         90        0.90       20.01
         16 |         75        0.75       20.76
         17 |        102        1.02       21.78
         18 |         96        0.96       22.74
         19 |        131        1.31       24.05
         20 |        140        1.40       25.45
         21 |        163        1.63       27.08
         22 |        148        1.48       28.56
         23 |        178        1.78       30.34
         24 |        165        1.65       31.99
         25 |        158        1.58       33.57
         26 |        168        1.68       35.25
         27 |        183        1.83       37.08
         28 |        184        1.84       38.92
         29 |        165        1.65       40.57
         30 |        192        1.92       42.49
         31 |        168        1.68       44.17
         32 |        156        1.56       45.73
         33 |        148        1.48       47.21
         34 |        168        1.68       48.89
         35 |        168        1.68       50.57
         36 |        158        1.58       52.15
         37 |        162        1.62       53.77
         38 |        143        1.43       55.20
         39 |        140        1.40       56.60
         40 |        112        1.12       57.72
         41 |        163        1.63       59.35
         42 |        136        1.36       60.71
         43 |        122        1.22       61.93
         44 |        124        1.24       63.17
         45 |        122        1.22       64.39
         46 |        111        1.11       65.50
         47 |        135        1.35       66.85
         48 |        117        1.17       68.02
         49 |        127        1.27       69.29
         50 |        109        1.09       70.38
         51 |        102        1.02       71.40
         52 |        107        1.07       72.47
         53 |        118        1.18       73.65
         54 |         97        0.97       74.62
         55 |         98        0.98       75.60
         56 |         81        0.81       76.41
         57 |        113        1.13       77.54
         58 |         85        0.85       78.39
         59 |        111        1.11       79.50
         60 |        116        1.16       80.66
         61 |         97        0.97       81.63
         62 |        119        1.19       82.82
         63 |        119        1.19       84.01
         64 |        107        1.07       85.08
         65 |        110        1.10       86.18
         66 |        119        1.19       87.37
         67 |         91        0.91       88.28
         68 |         90        0.90       89.18
         69 |        100        1.00       90.18
         70 |         69        0.69       90.87
         71 |         75        0.75       91.62
         72 |         95        0.95       92.57
         73 |         79        0.79       93.36
         74 |         81        0.81       94.17
         75 |         67        0.67       94.84
         76 |         62        0.62       95.46
         77 |         63        0.63       96.09
         78 |         54        0.54       96.63
         79 |         49        0.49       97.12
         80 |         42        0.42       97.54
         81 |         32        0.32       97.86
         82 |         26        0.26       98.12
         83 |         25        0.25       98.37
         84 |         37        0.37       98.74
         85 |         26        0.26       99.00
         86 |         16        0.16       99.16
         87 |         23        0.23       99.39
         88 |         17        0.17       99.56
         89 |         10        0.10       99.66
         90 |          5        0.05       99.71
         91 |          8        0.08       99.79
         92 |          8        0.08       99.87
         93 |          5        0.05       99.92
         94 |          2        0.02       99.94
         95 |          1        0.01       99.95
         97 |          1        0.01       99.96
         98 |          2        0.02       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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