Frequencies for first 10,000 rows of age variable in nhamcsed1998 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        362        3.62        3.62
                 1 |        277        2.77        6.39
                 2 |        192        1.92        8.31
                 3 |        175        1.75       10.06
                 4 |        117        1.17       11.23
                 5 |        109        1.09       12.32
                 6 |        121        1.21       13.53
                 7 |        111        1.11       14.64
                 8 |        103        1.03       15.67
                 9 |         89        0.89       16.56
                10 |        107        1.07       17.63
                11 |         83        0.83       18.46
                12 |         87        0.87       19.33
                13 |         93        0.93       20.26
                14 |        102        1.02       21.28
                15 |        101        1.01       22.29
                16 |        131        1.31       23.60
                17 |        134        1.34       24.94
                18 |        162        1.62       26.56
                19 |        149        1.49       28.05
                20 |        173        1.73       29.78
                21 |        179        1.79       31.57
                22 |        147        1.47       33.04
                23 |        157        1.57       34.61
                24 |        161        1.61       36.22
                25 |        165        1.65       37.87
                26 |        153        1.53       39.40
                27 |        207        2.07       41.47
                28 |        169        1.69       43.16
                29 |        174        1.74       44.90
                30 |        144        1.44       46.34
                31 |        177        1.77       48.11
                32 |        177        1.77       49.88
                33 |        163        1.63       51.51
                34 |        169        1.69       53.20
                35 |        184        1.84       55.04
                36 |        170        1.70       56.74
                37 |        165        1.65       58.39
                38 |        184        1.84       60.23
                39 |        156        1.56       61.79
                40 |        171        1.71       63.50
                41 |        169        1.69       65.19
                42 |        142        1.42       66.61
                43 |        124        1.24       67.85
                44 |        159        1.59       69.44
                45 |        125        1.25       70.69
                46 |        131        1.31       72.00
                47 |        124        1.24       73.24
                48 |        108        1.08       74.32
                49 |        117        1.17       75.49
                50 |        103        1.03       76.52
                51 |        110        1.10       77.62
                52 |         81        0.81       78.43
                53 |         88        0.88       79.31
                54 |         75        0.75       80.06
                55 |         90        0.90       80.96
                56 |         70        0.70       81.66
                57 |         70        0.70       82.36
                58 |         65        0.65       83.01
                59 |         73        0.73       83.74
                60 |         54        0.54       84.28
                61 |         74        0.74       85.02
                62 |         46        0.46       85.48
                63 |         52        0.52       86.00
                64 |         57        0.57       86.57
                65 |         68        0.68       87.25
                66 |         54        0.54       87.79
                67 |         60        0.60       88.39
                68 |         64        0.64       89.03
                69 |         55        0.55       89.58
                70 |         63        0.63       90.21
                71 |         57        0.57       90.78
                72 |         54        0.54       91.32
                73 |         51        0.51       91.83
                74 |         57        0.57       92.40
                75 |         64        0.64       93.04
                76 |         56        0.56       93.60
                77 |         59        0.59       94.19
                78 |         52        0.52       94.71
                79 |         58        0.58       95.29
                80 |         56        0.56       95.85
                81 |         37        0.37       96.22
                82 |         32        0.32       96.54
                83 |         43        0.43       96.97
                84 |         48        0.48       97.45
                85 |         43        0.43       97.88
                86 |         39        0.39       98.27
                87 |         37        0.37       98.64
                88 |         30        0.30       98.94
                89 |         20        0.20       99.14
                90 |         18        0.18       99.32
                91 |         16        0.16       99.48
                92 |         13        0.13       99.61
                93 |         11        0.11       99.72
                94 |          6        0.06       99.78
                95 |         12        0.12       99.90
                96 |          3        0.03       99.93
                97 |          3        0.03       99.96
                98 |          1        0.01       99.97
                99 |          1        0.01       99.98
100 years and over |          2        0.02      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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