Frequencies for first 10,000 rows of age variable in nhamcsopd2000 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        376        3.76        3.76
                 1 |        202        2.02        5.78
                 2 |        125        1.25        7.03
                 3 |        115        1.15        8.18
                 4 |        102        1.02        9.20
                 5 |        106        1.06       10.26
                 6 |         93        0.93       11.19
                 7 |         74        0.74       11.93
                 8 |         89        0.89       12.82
                 9 |         86        0.86       13.68
                10 |         92        0.92       14.60
                11 |         79        0.79       15.39
                12 |        107        1.07       16.46
                13 |         90        0.90       17.36
                14 |         73        0.73       18.09
                15 |         91        0.91       19.00
                16 |         92        0.92       19.92
                17 |        100        1.00       20.92
                18 |        107        1.07       21.99
                19 |        105        1.05       23.04
                20 |        124        1.24       24.28
                21 |        116        1.16       25.44
                22 |        100        1.00       26.44
                23 |        120        1.20       27.64
                24 |        117        1.17       28.81
                25 |        119        1.19       30.00
                26 |        123        1.23       31.23
                27 |        123        1.23       32.46
                28 |        130        1.30       33.76
                29 |        137        1.37       35.13
                30 |        124        1.24       36.37
                31 |        120        1.20       37.57
                32 |        142        1.42       38.99
                33 |        134        1.34       40.33
                34 |        119        1.19       41.52
                35 |        173        1.73       43.25
                36 |        159        1.59       44.84
                37 |        135        1.35       46.19
                38 |        144        1.44       47.63
                39 |        146        1.46       49.09
                40 |        173        1.73       50.82
                41 |        149        1.49       52.31
                42 |        146        1.46       53.77
                43 |        142        1.42       55.19
                44 |        162        1.62       56.81
                45 |        151        1.51       58.32
                46 |        173        1.73       60.05
                47 |        137        1.37       61.42
                48 |        142        1.42       62.84
                49 |        159        1.59       64.43
                50 |        145        1.45       65.88
                51 |        135        1.35       67.23
                52 |        146        1.46       68.69
                53 |        137        1.37       70.06
                54 |        130        1.30       71.36
                55 |        128        1.28       72.64
                56 |        116        1.16       73.80
                57 |        104        1.04       74.84
                58 |        113        1.13       75.97
                59 |        123        1.23       77.20
                60 |        126        1.26       78.46
                61 |        107        1.07       79.53
                62 |        111        1.11       80.64
                63 |         98        0.98       81.62
                64 |        111        1.11       82.73
                65 |        100        1.00       83.73
                66 |         97        0.97       84.70
                67 |        104        1.04       85.74
                68 |        107        1.07       86.81
                69 |        112        1.12       87.93
                70 |         93        0.93       88.86
                71 |        106        1.06       89.92
                72 |         97        0.97       90.89
                73 |         68        0.68       91.57
                74 |         96        0.96       92.53
                75 |         85        0.85       93.38
                76 |         85        0.85       94.23
                77 |         79        0.79       95.02
                78 |         54        0.54       95.56
                79 |         65        0.65       96.21
                80 |         57        0.57       96.78
                81 |         50        0.50       97.28
                82 |         49        0.49       97.77
                83 |         35        0.35       98.12
                84 |         27        0.27       98.39
                85 |         24        0.24       98.63
                86 |         28        0.28       98.91
                87 |         23        0.23       99.14
                88 |         21        0.21       99.35
                89 |         24        0.24       99.59
                90 |          9        0.09       99.68
                91 |          7        0.07       99.75
                92 |          5        0.05       99.80
                93 |          5        0.05       99.85
                94 |          3        0.03       99.88
                95 |          2        0.02       99.90
                98 |          4        0.04       99.94
                99 |          1        0.01       99.95
100 years and over |          5        0.05      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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