Frequencies for first 10,000 rows of age variable in nhamcsopd2004 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        370        3.70        3.70
                 1 |        217        2.17        5.87
                 2 |        183        1.83        7.70
                 3 |        113        1.13        8.83
                 4 |        113        1.13        9.96
                 5 |         87        0.87       10.83
                 6 |         92        0.92       11.75
                 7 |         91        0.91       12.66
                 8 |         75        0.75       13.41
                 9 |         94        0.94       14.35
                10 |         81        0.81       15.16
                11 |         99        0.99       16.15
                12 |        101        1.01       17.16
                13 |        100        1.00       18.16
                14 |        106        1.06       19.22
                15 |        129        1.29       20.51
                16 |        108        1.08       21.59
                17 |        142        1.42       23.01
                18 |        117        1.17       24.18
                19 |        130        1.30       25.48
                20 |        104        1.04       26.52
                21 |        137        1.37       27.89
                22 |        132        1.32       29.21
                23 |        128        1.28       30.49
                24 |        141        1.41       31.90
                25 |        140        1.40       33.30
                26 |        128        1.28       34.58
                27 |        137        1.37       35.95
                28 |        127        1.27       37.22
                29 |        124        1.24       38.46
                30 |        152        1.52       39.98
                31 |        137        1.37       41.35
                32 |        114        1.14       42.49
                33 |        136        1.36       43.85
                34 |        150        1.50       45.35
                35 |        130        1.30       46.65
                36 |        115        1.15       47.80
                37 |        113        1.13       48.93
                38 |        154        1.54       50.47
                39 |        143        1.43       51.90
                40 |        103        1.03       52.93
                41 |        135        1.35       54.28
                42 |        144        1.44       55.72
                43 |        137        1.37       57.09
                44 |        160        1.60       58.69
                45 |        164        1.64       60.33
                46 |        120        1.20       61.53
                47 |        168        1.68       63.21
                48 |        130        1.30       64.51
                49 |        148        1.48       65.99
                50 |        154        1.54       67.53
                51 |        136        1.36       68.89
                52 |        148        1.48       70.37
                53 |        129        1.29       71.66
                54 |        134        1.34       73.00
                55 |        146        1.46       74.46
                56 |        123        1.23       75.69
                57 |        136        1.36       77.05
                58 |        127        1.27       78.32
                59 |        119        1.19       79.51
                60 |        121        1.21       80.72
                61 |        137        1.37       82.09
                62 |        117        1.17       83.26
                63 |        113        1.13       84.39
                64 |         88        0.88       85.27
                65 |         98        0.98       86.25
                66 |         93        0.93       87.18
                67 |         81        0.81       87.99
                68 |         90        0.90       88.89
                69 |         89        0.89       89.78
                70 |         69        0.69       90.47
                71 |         74        0.74       91.21
                72 |         85        0.85       92.06
                73 |         93        0.93       92.99
                74 |         54        0.54       93.53
                75 |         54        0.54       94.07
                76 |         78        0.78       94.85
                77 |         75        0.75       95.60
                78 |         56        0.56       96.16
                79 |         50        0.50       96.66
                80 |         51        0.51       97.17
                81 |         46        0.46       97.63
                82 |         32        0.32       97.95
                83 |         40        0.40       98.35
                84 |         22        0.22       98.57
                85 |         21        0.21       98.78
                86 |         15        0.15       98.93
                87 |         15        0.15       99.08
                88 |         19        0.19       99.27
                89 |         12        0.12       99.39
                90 |         10        0.10       99.49
                91 |          9        0.09       99.58
                92 |          9        0.09       99.67
                93 |          4        0.04       99.71
                94 |          5        0.05       99.76
                95 |          6        0.06       99.82
                96 |          5        0.05       99.87
                97 |          4        0.04       99.91
                98 |          2        0.02       99.93
                99 |          1        0.01       99.94
100 years and over |          6        0.06      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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