Frequencies for first 10,000 rows of age variable in nhamcsopd2006 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        432        4.32        4.32
                 1 |        243        2.43        6.75
                 2 |        171        1.71        8.46
                 3 |        148        1.48        9.94
                 4 |        135        1.35       11.29
                 5 |        119        1.19       12.48
                 6 |         99        0.99       13.47
                 7 |        110        1.10       14.57
                 8 |        115        1.15       15.72
                 9 |         93        0.93       16.65
                10 |        103        1.03       17.68
                11 |        103        1.03       18.71
                12 |        113        1.13       19.84
                13 |        110        1.10       20.94
                14 |        111        1.11       22.05
                15 |        131        1.31       23.36
                16 |        120        1.20       24.56
                17 |        139        1.39       25.95
                18 |        127        1.27       27.22
                19 |         98        0.98       28.20
                20 |        112        1.12       29.32
                21 |        119        1.19       30.51
                22 |        127        1.27       31.78
                23 |         95        0.95       32.73
                24 |        118        1.18       33.91
                25 |        130        1.30       35.21
                26 |        123        1.23       36.44
                27 |        126        1.26       37.70
                28 |        114        1.14       38.84
                29 |        136        1.36       40.20
                30 |        126        1.26       41.46
                31 |        115        1.15       42.61
                32 |        115        1.15       43.76
                33 |        117        1.17       44.93
                34 |        157        1.57       46.50
                35 |        153        1.53       48.03
                36 |        119        1.19       49.22
                37 |        116        1.16       50.38
                38 |        120        1.20       51.58
                39 |        134        1.34       52.92
                40 |        135        1.35       54.27
                41 |        126        1.26       55.53
                42 |        150        1.50       57.03
                43 |        151        1.51       58.54
                44 |        143        1.43       59.97
                45 |        135        1.35       61.32
                46 |        152        1.52       62.84
                47 |        169        1.69       64.53
                48 |        142        1.42       65.95
                49 |        146        1.46       67.41
                50 |        143        1.43       68.84
                51 |        134        1.34       70.18
                52 |        143        1.43       71.61
                53 |        143        1.43       73.04
                54 |        142        1.42       74.46
                55 |        116        1.16       75.62
                56 |        122        1.22       76.84
                57 |        112        1.12       77.96
                58 |        111        1.11       79.07
                59 |        131        1.31       80.38
                60 |         97        0.97       81.35
                61 |         80        0.80       82.15
                62 |        101        1.01       83.16
                63 |         96        0.96       84.12
                64 |         91        0.91       85.03
                65 |         83        0.83       85.86
                66 |         92        0.92       86.78
                67 |         81        0.81       87.59
                68 |         83        0.83       88.42
                69 |         69        0.69       89.11
                70 |         83        0.83       89.94
                71 |         77        0.77       90.71
                72 |         58        0.58       91.29
                73 |         84        0.84       92.13
                74 |         74        0.74       92.87
                75 |         66        0.66       93.53
                76 |         59        0.59       94.12
                77 |         58        0.58       94.70
                78 |         71        0.71       95.41
                79 |         57        0.57       95.98
                80 |         61        0.61       96.59
                81 |         41        0.41       97.00
                82 |         40        0.40       97.40
                83 |         46        0.46       97.86
                84 |         36        0.36       98.22
                85 |         31        0.31       98.53
                86 |         25        0.25       98.78
                87 |         29        0.29       99.07
                88 |         17        0.17       99.24
                89 |         20        0.20       99.44
                90 |         11        0.11       99.55
                91 |         14        0.14       99.69
                92 |          9        0.09       99.78
                93 |          7        0.07       99.85
                94 |          4        0.04       99.89
                95 |          1        0.01       99.90
                96 |          1        0.01       99.91
                97 |          4        0.04       99.95
                98 |          2        0.02       99.97
                99 |          1        0.01       99.98
100 years and over |          2        0.02      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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