Frequencies for first 10,000 rows of age variable in namcs1994 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        305        3.05        3.05
          1 |        182        1.82        4.87
          2 |        100        1.00        5.87
          3 |        137        1.37        7.24
          4 |         87        0.87        8.11
          5 |        106        1.06        9.17
          6 |         80        0.80        9.97
          7 |         78        0.78       10.75
          8 |         84        0.84       11.59
          9 |         77        0.77       12.36
         10 |         76        0.76       13.12
         11 |         74        0.74       13.86
         12 |         89        0.89       14.75
         13 |         71        0.71       15.46
         14 |         77        0.77       16.23
         15 |         80        0.80       17.03
         16 |         91        0.91       17.94
         17 |         95        0.95       18.89
         18 |         67        0.67       19.56
         19 |         57        0.57       20.13
         20 |         81        0.81       20.94
         21 |         68        0.68       21.62
         22 |         77        0.77       22.39
         23 |        107        1.07       23.46
         24 |        111        1.11       24.57
         25 |        110        1.10       25.67
         26 |        121        1.21       26.88
         27 |        109        1.09       27.97
         28 |         92        0.92       28.89
         29 |        126        1.26       30.15
         30 |        128        1.28       31.43
         31 |        137        1.37       32.80
         32 |        130        1.30       34.10
         33 |        124        1.24       35.34
         34 |        126        1.26       36.60
         35 |        140        1.40       38.00
         36 |        134        1.34       39.34
         37 |        160        1.60       40.94
         38 |        153        1.53       42.47
         39 |        159        1.59       44.06
         40 |        137        1.37       45.43
         41 |        133        1.33       46.76
         42 |        152        1.52       48.28
         43 |        151        1.51       49.79
         44 |        138        1.38       51.17
         45 |        137        1.37       52.54
         46 |        114        1.14       53.68
         47 |        132        1.32       55.00
         48 |        111        1.11       56.11
         49 |        112        1.12       57.23
         50 |        132        1.32       58.55
         51 |        128        1.28       59.83
         52 |        110        1.10       60.93
         53 |        109        1.09       62.02
         54 |        106        1.06       63.08
         55 |        106        1.06       64.14
         56 |        116        1.16       65.30
         57 |        103        1.03       66.33
         58 |        120        1.20       67.53
         59 |        123        1.23       68.76
         60 |        111        1.11       69.87
         61 |        103        1.03       70.90
         62 |        112        1.12       72.02
         63 |        125        1.25       73.27
         64 |        128        1.28       74.55
         65 |        147        1.47       76.02
         66 |        131        1.31       77.33
         67 |        133        1.33       78.66
         68 |        137        1.37       80.03
         69 |        143        1.43       81.46
         70 |        129        1.29       82.75
         71 |        139        1.39       84.14
         72 |        154        1.54       85.68
         73 |        125        1.25       86.93
         74 |        142        1.42       88.35
         75 |        124        1.24       89.59
         76 |         98        0.98       90.57
         77 |        119        1.19       91.76
         78 |        112        1.12       92.88
         79 |         94        0.94       93.82
         80 |         85        0.85       94.67
         81 |         92        0.92       95.59
         82 |         65        0.65       96.24
         83 |         69        0.69       96.93
         84 |         54        0.54       97.47
         85 |         51        0.51       97.98
         86 |         35        0.35       98.33
         87 |         32        0.32       98.65
         88 |         31        0.31       98.96
         89 |         18        0.18       99.14
         90 |         24        0.24       99.38
         91 |         14        0.14       99.52
         92 |         15        0.15       99.67
         93 |         11        0.11       99.78
         94 |         10        0.10       99.88
         95 |          2        0.02       99.90
         96 |          6        0.06       99.96
         97 |          3        0.03       99.99
         98 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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