Frequencies for first 10,000 rows of age variable in namcs1997 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        303        3.03        3.03
                 1 |        232        2.32        5.35
                 2 |        124        1.24        6.59
                 3 |        116        1.16        7.75
                 4 |        118        1.18        8.93
                 5 |        103        1.03        9.96
                 6 |         92        0.92       10.88
                 7 |         95        0.95       11.83
                 8 |         59        0.59       12.42
                 9 |         62        0.62       13.04
                10 |         84        0.84       13.88
                11 |         81        0.81       14.69
                12 |         65        0.65       15.34
                13 |         70        0.70       16.04
                14 |         82        0.82       16.86
                15 |         77        0.77       17.63
                16 |        114        1.14       18.77
                17 |         90        0.90       19.67
                18 |         54        0.54       20.21
                19 |         62        0.62       20.83
                20 |         52        0.52       21.35
                21 |         48        0.48       21.83
                22 |         67        0.67       22.50
                23 |         70        0.70       23.20
                24 |         71        0.71       23.91
                25 |         79        0.79       24.70
                26 |        104        1.04       25.74
                27 |         85        0.85       26.59
                28 |         82        0.82       27.41
                29 |         91        0.91       28.32
                30 |        104        1.04       29.36
                31 |        102        1.02       30.38
                32 |        125        1.25       31.63
                33 |        105        1.05       32.68
                34 |        115        1.15       33.83
                35 |        135        1.35       35.18
                36 |        129        1.29       36.47
                37 |        112        1.12       37.59
                38 |        124        1.24       38.83
                39 |        122        1.22       40.05
                40 |        117        1.17       41.22
                41 |        126        1.26       42.48
                42 |        121        1.21       43.69
                43 |        138        1.38       45.07
                44 |        114        1.14       46.21
                45 |        127        1.27       47.48
                46 |        138        1.38       48.86
                47 |        136        1.36       50.22
                48 |        157        1.57       51.79
                49 |        167        1.67       53.46
                50 |        151        1.51       54.97
                51 |        131        1.31       56.28
                52 |        126        1.26       57.54
                53 |        127        1.27       58.81
                54 |        137        1.37       60.18
                55 |        132        1.32       61.50
                56 |        113        1.13       62.63
                57 |        109        1.09       63.72
                58 |        114        1.14       64.86
                59 |        118        1.18       66.04
                60 |        114        1.14       67.18
                61 |        140        1.40       68.58
                62 |        136        1.36       69.94
                63 |        119        1.19       71.13
                64 |         92        0.92       72.05
                65 |        130        1.30       73.35
                66 |        129        1.29       74.64
                67 |        110        1.10       75.74
                68 |        157        1.57       77.31
                69 |        121        1.21       78.52
                70 |        137        1.37       79.89
                71 |        158        1.58       81.47
                72 |        163        1.63       83.10
                73 |        146        1.46       84.56
                74 |        172        1.72       86.28
                75 |        120        1.20       87.48
                76 |        143        1.43       88.91
                77 |        130        1.30       90.21
                78 |        109        1.09       91.30
                79 |        105        1.05       92.35
                80 |        115        1.15       93.50
                81 |        100        1.00       94.50
                82 |         94        0.94       95.44
                83 |         79        0.79       96.23
                84 |         67        0.67       96.90
                85 |         62        0.62       97.52
                86 |         58        0.58       98.10
                87 |         34        0.34       98.44
                88 |         47        0.47       98.91
                89 |         23        0.23       99.14
                90 |         31        0.31       99.45
                91 |         16        0.16       99.61
                92 |         18        0.18       99.79
                93 |          6        0.06       99.85
                94 |          4        0.04       99.89
                95 |          2        0.02       99.91
                96 |          6        0.06       99.97
                97 |          1        0.01       99.98
                98 |          1        0.01       99.99
100 years and over |          1        0.01      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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