Frequencies for first 10,000 rows of age variable in namcs1993 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        519        5.19        5.19
          1 |        320        3.20        8.39
          2 |        187        1.87       10.26
          3 |        189        1.89       12.15
          4 |        160        1.60       13.75
          5 |        162        1.62       15.37
          6 |        122        1.22       16.59
          7 |        120        1.20       17.79
          8 |        116        1.16       18.95
          9 |         89        0.89       19.84
         10 |         99        0.99       20.83
         11 |         88        0.88       21.71
         12 |         99        0.99       22.70
         13 |         85        0.85       23.55
         14 |        100        1.00       24.55
         15 |         97        0.97       25.52
         16 |         88        0.88       26.40
         17 |         79        0.79       27.19
         18 |         84        0.84       28.03
         19 |         73        0.73       28.76
         20 |         67        0.67       29.43
         21 |         72        0.72       30.15
         22 |         74        0.74       30.89
         23 |         74        0.74       31.63
         24 |         89        0.89       32.52
         25 |         80        0.80       33.32
         26 |         98        0.98       34.30
         27 |         86        0.86       35.16
         28 |         89        0.89       36.05
         29 |         95        0.95       37.00
         30 |        118        1.18       38.18
         31 |        104        1.04       39.22
         32 |         89        0.89       40.11
         33 |        122        1.22       41.33
         34 |        135        1.35       42.68
         35 |        123        1.23       43.91
         36 |        105        1.05       44.96
         37 |        127        1.27       46.23
         38 |        140        1.40       47.63
         39 |        144        1.44       49.07
         40 |        132        1.32       50.39
         41 |        128        1.28       51.67
         42 |        127        1.27       52.94
         43 |        137        1.37       54.31
         44 |        121        1.21       55.52
         45 |        135        1.35       56.87
         46 |        137        1.37       58.24
         47 |        109        1.09       59.33
         48 |        110        1.10       60.43
         49 |        122        1.22       61.65
         50 |        106        1.06       62.71
         51 |         98        0.98       63.69
         52 |        120        1.20       64.89
         53 |        107        1.07       65.96
         54 |        100        1.00       66.96
         55 |        115        1.15       68.11
         56 |         84        0.84       68.95
         57 |        104        1.04       69.99
         58 |         91        0.91       70.90
         59 |         76        0.76       71.66
         60 |        109        1.09       72.75
         61 |        141        1.41       74.16
         62 |         92        0.92       75.08
         63 |        102        1.02       76.10
         64 |        102        1.02       77.12
         65 |        130        1.30       78.42
         66 |        124        1.24       79.66
         67 |        148        1.48       81.14
         68 |        106        1.06       82.20
         69 |        134        1.34       83.54
         70 |        136        1.36       84.90
         71 |        127        1.27       86.17
         72 |        114        1.14       87.31
         73 |        118        1.18       88.49
         74 |        112        1.12       89.61
         75 |        115        1.15       90.76
         76 |        115        1.15       91.91
         77 |         92        0.92       92.83
         78 |         83        0.83       93.66
         79 |        105        1.05       94.71
         80 |         69        0.69       95.40
         81 |         64        0.64       96.04
         82 |         65        0.65       96.69
         83 |         72        0.72       97.41
         84 |         53        0.53       97.94
         85 |         41        0.41       98.35
         86 |         27        0.27       98.62
         87 |         32        0.32       98.94
         88 |         28        0.28       99.22
         89 |         22        0.22       99.44
         90 |         21        0.21       99.65
         91 |          9        0.09       99.74
         92 |          8        0.08       99.82
         93 |          5        0.05       99.87
         94 |          3        0.03       99.90
         95 |          4        0.04       99.94
         96 |          1        0.01       99.95
         97 |          3        0.03       99.98
         98 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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