Frequencies for first 10,000 rows of age variable in nhamcsopd2008 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        409        4.09        4.09
                 1 |        296        2.96        7.05
                 2 |        172        1.72        8.77
                 3 |        144        1.44       10.21
                 4 |        120        1.20       11.41
                 5 |        116        1.16       12.57
                 6 |        120        1.20       13.77
                 7 |        127        1.27       15.04
                 8 |        117        1.17       16.21
                 9 |        146        1.46       17.67
                10 |        125        1.25       18.92
                11 |        100        1.00       19.92
                12 |        106        1.06       20.98
                13 |        107        1.07       22.05
                14 |        120        1.20       23.25
                15 |        113        1.13       24.38
                16 |        130        1.30       25.68
                17 |        121        1.21       26.89
                18 |        127        1.27       28.16
                19 |        118        1.18       29.34
                20 |         98        0.98       30.32
                21 |        102        1.02       31.34
                22 |         87        0.87       32.21
                23 |        121        1.21       33.42
                24 |        106        1.06       34.48
                25 |        114        1.14       35.62
                26 |        119        1.19       36.81
                27 |        135        1.35       38.16
                28 |        110        1.10       39.26
                29 |        106        1.06       40.32
                30 |        139        1.39       41.71
                31 |        107        1.07       42.78
                32 |        132        1.32       44.10
                33 |        106        1.06       45.16
                34 |        124        1.24       46.40
                35 |        137        1.37       47.77
                36 |        115        1.15       48.92
                37 |        107        1.07       49.99
                38 |        110        1.10       51.09
                39 |        129        1.29       52.38
                40 |        114        1.14       53.52
                41 |        108        1.08       54.60
                42 |        112        1.12       55.72
                43 |        118        1.18       56.90
                44 |        104        1.04       57.94
                45 |        127        1.27       59.21
                46 |        151        1.51       60.72
                47 |        117        1.17       61.89
                48 |        122        1.22       63.11
                49 |        146        1.46       64.57
                50 |        131        1.31       65.88
                51 |        146        1.46       67.34
                52 |        138        1.38       68.72
                53 |        154        1.54       70.26
                54 |        118        1.18       71.44
                55 |        140        1.40       72.84
                56 |        132        1.32       74.16
                57 |        119        1.19       75.35
                58 |        128        1.28       76.63
                59 |        127        1.27       77.90
                60 |        124        1.24       79.14
                61 |        136        1.36       80.50
                62 |         97        0.97       81.47
                63 |         95        0.95       82.42
                64 |        107        1.07       83.49
                65 |         88        0.88       84.37
                66 |        101        1.01       85.38
                67 |         89        0.89       86.27
                68 |         75        0.75       87.02
                69 |         76        0.76       87.78
                70 |         90        0.90       88.68
                71 |         86        0.86       89.54
                72 |         76        0.76       90.30
                73 |         77        0.77       91.07
                74 |         57        0.57       91.64
                75 |         73        0.73       92.37
                76 |         64        0.64       93.01
                77 |         71        0.71       93.72
                78 |         74        0.74       94.46
                79 |         52        0.52       94.98
                80 |         74        0.74       95.72
                81 |         51        0.51       96.23
                82 |         57        0.57       96.80
                83 |         58        0.58       97.38
                84 |         52        0.52       97.90
                85 |         29        0.29       98.19
                86 |         31        0.31       98.50
                87 |         29        0.29       98.79
                88 |         36        0.36       99.15
                89 |         19        0.19       99.34
                90 |         13        0.13       99.47
                91 |         18        0.18       99.65
                92 |         11        0.11       99.76
                93 |          3        0.03       99.79
                94 |          8        0.08       99.87
                95 |          6        0.06       99.93
                96 |          2        0.02       99.95
                97 |          2        0.02       99.97
                98 |          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