Frequencies for first 10,000 rows of age variable in nhamcsopd2007 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        411        4.11        4.11
                 1 |        218        2.18        6.29
                 2 |        132        1.32        7.61
                 3 |         90        0.90        8.51
                 4 |         91        0.91        9.42
                 5 |         87        0.87       10.29
                 6 |         83        0.83       11.12
                 7 |         91        0.91       12.03
                 8 |         92        0.92       12.95
                 9 |         71        0.71       13.66
                10 |         74        0.74       14.40
                11 |         83        0.83       15.23
                12 |         82        0.82       16.05
                13 |         69        0.69       16.74
                14 |         85        0.85       17.59
                15 |        109        1.09       18.68
                16 |        118        1.18       19.86
                17 |        123        1.23       21.09
                18 |        113        1.13       22.22
                19 |        127        1.27       23.49
                20 |        143        1.43       24.92
                21 |        106        1.06       25.98
                22 |        150        1.50       27.48
                23 |        141        1.41       28.89
                24 |        134        1.34       30.23
                25 |        127        1.27       31.50
                26 |        133        1.33       32.83
                27 |        119        1.19       34.02
                28 |        136        1.36       35.38
                29 |        131        1.31       36.69
                30 |        128        1.28       37.97
                31 |        117        1.17       39.14
                32 |        125        1.25       40.39
                33 |        115        1.15       41.54
                34 |         99        0.99       42.53
                35 |        124        1.24       43.77
                36 |        120        1.20       44.97
                37 |        127        1.27       46.24
                38 |        120        1.20       47.44
                39 |        134        1.34       48.78
                40 |        111        1.11       49.89
                41 |        116        1.16       51.05
                42 |        118        1.18       52.23
                43 |        167        1.67       53.90
                44 |        161        1.61       55.51
                45 |        149        1.49       57.00
                46 |        157        1.57       58.57
                47 |        159        1.59       60.16
                48 |        173        1.73       61.89
                49 |        170        1.70       63.59
                50 |        163        1.63       65.22
                51 |        167        1.67       66.89
                52 |        166        1.66       68.55
                53 |        176        1.76       70.31
                54 |        146        1.46       71.77
                55 |        157        1.57       73.34
                56 |        156        1.56       74.90
                57 |        179        1.79       76.69
                58 |        128        1.28       77.97
                59 |        151        1.51       79.48
                60 |        112        1.12       80.60
                61 |        120        1.20       81.80
                62 |        104        1.04       82.84
                63 |         98        0.98       83.82
                64 |         94        0.94       84.76
                65 |         91        0.91       85.67
                66 |         89        0.89       86.56
                67 |         90        0.90       87.46
                68 |         74        0.74       88.20
                69 |        104        1.04       89.24
                70 |         80        0.80       90.04
                71 |         63        0.63       90.67
                72 |         70        0.70       91.37
                73 |         57        0.57       91.94
                74 |         59        0.59       92.53
                75 |         74        0.74       93.27
                76 |         77        0.77       94.04
                77 |         63        0.63       94.67
                78 |         63        0.63       95.30
                79 |         45        0.45       95.75
                80 |         49        0.49       96.24
                81 |         45        0.45       96.69
                82 |         32        0.32       97.01
                83 |         39        0.39       97.40
                84 |         41        0.41       97.81
                85 |         26        0.26       98.07
                86 |         50        0.50       98.57
                87 |         34        0.34       98.91
                88 |         24        0.24       99.15
                89 |         26        0.26       99.41
                90 |         12        0.12       99.53
                91 |         14        0.14       99.67
                92 |         11        0.11       99.78
                93 |          5        0.05       99.83
                94 |          4        0.04       99.87
                95 |          2        0.02       99.89
                96 |          3        0.03       99.92
                97 |          1        0.01       99.93
                99 |          3        0.03       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