Frequencies for first 10,000 rows of age variable in nhamcsopd2003 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        405        4.05        4.05
                 1 |        228        2.28        6.33
                 2 |        141        1.41        7.74
                 3 |        133        1.33        9.07
                 4 |        115        1.15       10.22
                 5 |         96        0.96       11.18
                 6 |        101        1.01       12.19
                 7 |         89        0.89       13.08
                 8 |         89        0.89       13.97
                 9 |         85        0.85       14.82
                10 |         94        0.94       15.76
                11 |        101        1.01       16.77
                12 |        110        1.10       17.87
                13 |         87        0.87       18.74
                14 |        115        1.15       19.89
                15 |        115        1.15       21.04
                16 |        136        1.36       22.40
                17 |        177        1.77       24.17
                18 |        120        1.20       25.37
                19 |        128        1.28       26.65
                20 |        137        1.37       28.02
                21 |        138        1.38       29.40
                22 |        136        1.36       30.76
                23 |        176        1.76       32.52
                24 |        120        1.20       33.72
                25 |        100        1.00       34.72
                26 |        137        1.37       36.09
                27 |        128        1.28       37.37
                28 |        116        1.16       38.53
                29 |        115        1.15       39.68
                30 |        116        1.16       40.84
                31 |        128        1.28       42.12
                32 |        174        1.74       43.86
                33 |        115        1.15       45.01
                34 |        123        1.23       46.24
                35 |        107        1.07       47.31
                36 |        145        1.45       48.76
                37 |        117        1.17       49.93
                38 |        135        1.35       51.28
                39 |        124        1.24       52.52
                40 |        134        1.34       53.86
                41 |        157        1.57       55.43
                42 |        136        1.36       56.79
                43 |        148        1.48       58.27
                44 |        148        1.48       59.75
                45 |        141        1.41       61.16
                46 |        138        1.38       62.54
                47 |        165        1.65       64.19
                48 |        140        1.40       65.59
                49 |        136        1.36       66.95
                50 |        158        1.58       68.53
                51 |        132        1.32       69.85
                52 |        142        1.42       71.27
                53 |        138        1.38       72.65
                54 |        110        1.10       73.75
                55 |        127        1.27       75.02
                56 |        139        1.39       76.41
                57 |        109        1.09       77.50
                58 |        117        1.17       78.67
                59 |        108        1.08       79.75
                60 |        102        1.02       80.77
                61 |        114        1.14       81.91
                62 |         95        0.95       82.86
                63 |        108        1.08       83.94
                64 |        107        1.07       85.01
                65 |        108        1.08       86.09
                66 |         76        0.76       86.85
                67 |         73        0.73       87.58
                68 |        101        1.01       88.59
                69 |         80        0.80       89.39
                70 |         75        0.75       90.14
                71 |         67        0.67       90.81
                72 |         84        0.84       91.65
                73 |         82        0.82       92.47
                74 |         63        0.63       93.10
                75 |         79        0.79       93.89
                76 |         72        0.72       94.61
                77 |         76        0.76       95.37
                78 |         50        0.50       95.87
                79 |         58        0.58       96.45
                80 |         51        0.51       96.96
                81 |         41        0.41       97.37
                82 |         40        0.40       97.77
                83 |         52        0.52       98.29
                84 |         29        0.29       98.58
                85 |         24        0.24       98.82
                86 |         29        0.29       99.11
                87 |         22        0.22       99.33
                88 |         16        0.16       99.49
                89 |         13        0.13       99.62
                90 |         10        0.10       99.72
                91 |          8        0.08       99.80
                92 |          3        0.03       99.83
                93 |          2        0.02       99.85
                94 |          2        0.02       99.87
                95 |          5        0.05       99.92
                96 |          3        0.03       99.95
                98 |          1        0.01       99.96
                99 |          1        0.01       99.97
100 years and over |          3        0.03      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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