Frequencies for first 10,000 rows of age variable in nhamcsopd1993 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        565        5.65        5.65
          1 |        297        2.97        8.62
          2 |        168        1.68       10.30
          3 |        163        1.63       11.93
          4 |        135        1.35       13.28
          5 |        114        1.14       14.42
          6 |         85        0.85       15.27
          7 |         86        0.86       16.13
          8 |         92        0.92       17.05
          9 |         70        0.70       17.75
         10 |         68        0.68       18.43
         11 |         53        0.53       18.96
         12 |         70        0.70       19.66
         13 |         55        0.55       20.21
         14 |         69        0.69       20.90
         15 |         85        0.85       21.75
         16 |         89        0.89       22.64
         17 |        117        1.17       23.81
         18 |        107        1.07       24.88
         19 |        150        1.50       26.38
         20 |        162        1.62       28.00
         21 |        173        1.73       29.73
         22 |        181        1.81       31.54
         23 |        174        1.74       33.28
         24 |        162        1.62       34.90
         25 |        168        1.68       36.58
         26 |        173        1.73       38.31
         27 |        174        1.74       40.05
         28 |        171        1.71       41.76
         29 |        204        2.04       43.80
         30 |        162        1.62       45.42
         31 |        167        1.67       47.09
         32 |        183        1.83       48.92
         33 |        173        1.73       50.65
         34 |        172        1.72       52.37
         35 |        174        1.74       54.11
         36 |        150        1.50       55.61
         37 |        160        1.60       57.21
         38 |        175        1.75       58.96
         39 |        121        1.21       60.17
         40 |        133        1.33       61.50
         41 |        136        1.36       62.86
         42 |        138        1.38       64.24
         43 |        128        1.28       65.52
         44 |        113        1.13       66.65
         45 |        106        1.06       67.71
         46 |        122        1.22       68.93
         47 |        103        1.03       69.96
         48 |        101        1.01       70.97
         49 |        115        1.15       72.12
         50 |        105        1.05       73.17
         51 |         99        0.99       74.16
         52 |        114        1.14       75.30
         53 |         99        0.99       76.29
         54 |         79        0.79       77.08
         55 |         92        0.92       78.00
         56 |         75        0.75       78.75
         57 |         95        0.95       79.70
         58 |         96        0.96       80.66
         59 |        107        1.07       81.73
         60 |        104        1.04       82.77
         61 |         90        0.90       83.67
         62 |         86        0.86       84.53
         63 |         70        0.70       85.23
         64 |         99        0.99       86.22
         65 |         77        0.77       86.99
         66 |         86        0.86       87.85
         67 |         73        0.73       88.58
         68 |         97        0.97       89.55
         69 |         85        0.85       90.40
         70 |         78        0.78       91.18
         71 |         77        0.77       91.95
         72 |         93        0.93       92.88
         73 |         80        0.80       93.68
         74 |         59        0.59       94.27
         75 |         67        0.67       94.94
         76 |         45        0.45       95.39
         77 |         46        0.46       95.85
         78 |         50        0.50       96.35
         79 |         43        0.43       96.78
         80 |         50        0.50       97.28
         81 |         33        0.33       97.61
         82 |         45        0.45       98.06
         83 |         30        0.30       98.36
         84 |         31        0.31       98.67
         85 |         30        0.30       98.97
         86 |         21        0.21       99.18
         87 |         17        0.17       99.35
         88 |         13        0.13       99.48
         89 |         18        0.18       99.66
         90 |          7        0.07       99.73
         91 |          9        0.09       99.82
         92 |          4        0.04       99.86
         93 |          4        0.04       99.90
         94 |          1        0.01       99.91
         95 |          3        0.03       99.94
         98 |          2        0.02       99.96
         99 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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