Frequencies for first 10,000 rows of age variable in nhamcsed2000 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        356        3.56        3.56
                 1 |        301        3.01        6.57
                 2 |        179        1.79        8.36
                 3 |        140        1.40        9.76
                 4 |        130        1.30       11.06
                 5 |        138        1.38       12.44
                 6 |        112        1.12       13.56
                 7 |        108        1.08       14.64
                 8 |         94        0.94       15.58
                 9 |         94        0.94       16.52
                10 |        111        1.11       17.63
                11 |         77        0.77       18.40
                12 |         77        0.77       19.17
                13 |         82        0.82       19.99
                14 |         82        0.82       20.81
                15 |        105        1.05       21.86
                16 |        123        1.23       23.09
                17 |        151        1.51       24.60
                18 |        166        1.66       26.26
                19 |        171        1.71       27.97
                20 |        172        1.72       29.69
                21 |        173        1.73       31.42
                22 |        164        1.64       33.06
                23 |        173        1.73       34.79
                24 |        159        1.59       36.38
                25 |        146        1.46       37.84
                26 |        149        1.49       39.33
                27 |        153        1.53       40.86
                28 |        156        1.56       42.42
                29 |        201        2.01       44.43
                30 |        185        1.85       46.28
                31 |        163        1.63       47.91
                32 |        157        1.57       49.48
                33 |        172        1.72       51.20
                34 |        183        1.83       53.03
                35 |        155        1.55       54.58
                36 |        167        1.67       56.25
                37 |        175        1.75       58.00
                38 |        167        1.67       59.67
                39 |        176        1.76       61.43
                40 |        158        1.58       63.01
                41 |        158        1.58       64.59
                42 |        139        1.39       65.98
                43 |        154        1.54       67.52
                44 |        150        1.50       69.02
                45 |        136        1.36       70.38
                46 |        112        1.12       71.50
                47 |        126        1.26       72.76
                48 |        130        1.30       74.06
                49 |        107        1.07       75.13
                50 |        101        1.01       76.14
                51 |         98        0.98       77.12
                52 |        116        1.16       78.28
                53 |         98        0.98       79.26
                54 |         82        0.82       80.08
                55 |         99        0.99       81.07
                56 |         76        0.76       81.83
                57 |         72        0.72       82.55
                58 |         67        0.67       83.22
                59 |         66        0.66       83.88
                60 |         67        0.67       84.55
                61 |         68        0.68       85.23
                62 |         65        0.65       85.88
                63 |         60        0.60       86.48
                64 |         51        0.51       86.99
                65 |         51        0.51       87.50
                66 |         54        0.54       88.04
                67 |         50        0.50       88.54
                68 |         58        0.58       89.12
                69 |         58        0.58       89.70
                70 |         47        0.47       90.17
                71 |         52        0.52       90.69
                72 |         60        0.60       91.29
                73 |         68        0.68       91.97
                74 |         51        0.51       92.48
                75 |         44        0.44       92.92
                76 |         53        0.53       93.45
                77 |         46        0.46       93.91
                78 |         52        0.52       94.43
                79 |         59        0.59       95.02
                80 |         49        0.49       95.51
                81 |         38        0.38       95.89
                82 |         47        0.47       96.36
                83 |         43        0.43       96.79
                84 |         54        0.54       97.33
                85 |         41        0.41       97.74
                86 |         33        0.33       98.07
                87 |         38        0.38       98.45
                88 |         33        0.33       98.78
                89 |         25        0.25       99.03
                90 |         20        0.20       99.23
                91 |         16        0.16       99.39
                92 |         11        0.11       99.50
                93 |         10        0.10       99.60
                94 |         14        0.14       99.74
                95 |          6        0.06       99.80
                96 |          6        0.06       99.86
                97 |          6        0.06       99.92
                98 |          3        0.03       99.95
                99 |          1        0.01       99.96
100 years and over |          4        0.04      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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