Frequencies for first 10,000 rows of age variable in nhamcsed1997 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        401        4.01        4.01
                 1 |        301        3.01        7.02
                 2 |        220        2.20        9.22
                 3 |        169        1.69       10.91
                 4 |        122        1.22       12.13
                 5 |        143        1.43       13.56
                 6 |        130        1.30       14.86
                 7 |        107        1.07       15.93
                 8 |         84        0.84       16.77
                 9 |         72        0.72       17.49
                10 |         82        0.82       18.31
                11 |         77        0.77       19.08
                12 |         72        0.72       19.80
                13 |         84        0.84       20.64
                14 |         85        0.85       21.49
                15 |         94        0.94       22.43
                16 |        115        1.15       23.58
                17 |        135        1.35       24.93
                18 |        148        1.48       26.41
                19 |        148        1.48       27.89
                20 |        142        1.42       29.31
                21 |        175        1.75       31.06
                22 |        164        1.64       32.70
                23 |        128        1.28       33.98
                24 |        184        1.84       35.82
                25 |        159        1.59       37.41
                26 |        180        1.80       39.21
                27 |        169        1.69       40.90
                28 |        161        1.61       42.51
                29 |        136        1.36       43.87
                30 |        183        1.83       45.70
                31 |        174        1.74       47.44
                32 |        172        1.72       49.16
                33 |        191        1.91       51.07
                34 |        198        1.98       53.05
                35 |        187        1.87       54.92
                36 |        181        1.81       56.73
                37 |        173        1.73       58.46
                38 |        160        1.60       60.06
                39 |        190        1.90       61.96
                40 |        160        1.60       63.56
                41 |        141        1.41       64.97
                42 |        133        1.33       66.30
                43 |        138        1.38       67.68
                44 |        121        1.21       68.89
                45 |        130        1.30       70.19
                46 |        116        1.16       71.35
                47 |        120        1.20       72.55
                48 |        134        1.34       73.89
                49 |        120        1.20       75.09
                50 |        115        1.15       76.24
                51 |         99        0.99       77.23
                52 |         76        0.76       77.99
                53 |         88        0.88       78.87
                54 |         82        0.82       79.69
                55 |         66        0.66       80.35
                56 |         82        0.82       81.17
                57 |         73        0.73       81.90
                58 |         75        0.75       82.65
                59 |         74        0.74       83.39
                60 |         58        0.58       83.97
                61 |         75        0.75       84.72
                62 |         57        0.57       85.29
                63 |         53        0.53       85.82
                64 |         45        0.45       86.27
                65 |         65        0.65       86.92
                66 |         63        0.63       87.55
                67 |         64        0.64       88.19
                68 |         71        0.71       88.90
                69 |         63        0.63       89.53
                70 |         57        0.57       90.10
                71 |         48        0.48       90.58
                72 |         60        0.60       91.18
                73 |         45        0.45       91.63
                74 |         50        0.50       92.13
                75 |         57        0.57       92.70
                76 |         69        0.69       93.39
                77 |         54        0.54       93.93
                78 |         49        0.49       94.42
                79 |         45        0.45       94.87
                80 |         61        0.61       95.48
                81 |         44        0.44       95.92
                82 |         43        0.43       96.35
                83 |         50        0.50       96.85
                84 |         45        0.45       97.30
                85 |         42        0.42       97.72
                86 |         46        0.46       98.18
                87 |         35        0.35       98.53
                88 |         25        0.25       98.78
                89 |         23        0.23       99.01
                90 |         33        0.33       99.34
                91 |         22        0.22       99.56
                92 |         13        0.13       99.69
                93 |         10        0.10       99.79
                94 |          7        0.07       99.86
                95 |          7        0.07       99.93
                96 |          4        0.04       99.97
                97 |          1        0.01       99.98
                98 |          1        0.01       99.99
                99 |          1        0.01      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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