Frequencies for first 10,000 rows of age variable in namcs2009 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        409        4.09        4.09
                 1 |        255        2.55        6.64
                 2 |        166        1.66        8.30
                 3 |        126        1.26        9.56
                 4 |        136        1.36       10.92
                 5 |        118        1.18       12.10
                 6 |        116        1.16       13.26
                 7 |        108        1.08       14.34
                 8 |         92        0.92       15.26
                 9 |         94        0.94       16.20
                10 |         95        0.95       17.15
                11 |        107        1.07       18.22
                12 |         96        0.96       19.18
                13 |         95        0.95       20.13
                14 |         96        0.96       21.09
                15 |        107        1.07       22.16
                16 |        103        1.03       23.19
                17 |         84        0.84       24.03
                18 |         87        0.87       24.90
                19 |         72        0.72       25.62
                20 |         66        0.66       26.28
                21 |         62        0.62       26.90
                22 |         55        0.55       27.45
                23 |         76        0.76       28.21
                24 |         81        0.81       29.02
                25 |         83        0.83       29.85
                26 |         72        0.72       30.57
                27 |         67        0.67       31.24
                28 |         83        0.83       32.07
                29 |         89        0.89       32.96
                30 |         85        0.85       33.81
                31 |         72        0.72       34.53
                32 |         84        0.84       35.37
                33 |         89        0.89       36.26
                34 |         70        0.70       36.96
                35 |         99        0.99       37.95
                36 |        111        1.11       39.06
                37 |        101        1.01       40.07
                38 |        122        1.22       41.29
                39 |        114        1.14       42.43
                40 |        116        1.16       43.59
                41 |        109        1.09       44.68
                42 |        126        1.26       45.94
                43 |        109        1.09       47.03
                44 |        133        1.33       48.36
                45 |        135        1.35       49.71
                46 |        116        1.16       50.87
                47 |        144        1.44       52.31
                48 |        155        1.55       53.86
                49 |        149        1.49       55.35
                50 |        157        1.57       56.92
                51 |        162        1.62       58.54
                52 |        171        1.71       60.25
                53 |        164        1.64       61.89
                54 |        147        1.47       63.36
                55 |        150        1.50       64.86
                56 |        169        1.69       66.55
                57 |        147        1.47       68.02
                58 |        145        1.45       69.47
                59 |        127        1.27       70.74
                60 |        154        1.54       72.28
                61 |        135        1.35       73.63
                62 |        147        1.47       75.10
                63 |        122        1.22       76.32
                64 |        104        1.04       77.36
                65 |        135        1.35       78.71
                66 |        136        1.36       80.07
                67 |        118        1.18       81.25
                68 |        109        1.09       82.34
                69 |        105        1.05       83.39
                70 |        105        1.05       84.44
                71 |        105        1.05       85.49
                72 |         94        0.94       86.43
                73 |         99        0.99       87.42
                74 |         82        0.82       88.24
                75 |        110        1.10       89.34
                76 |         98        0.98       90.32
                77 |         90        0.90       91.22
                78 |         83        0.83       92.05
                79 |         82        0.82       92.87
                80 |         93        0.93       93.80
                81 |         63        0.63       94.43
                82 |         71        0.71       95.14
                83 |         73        0.73       95.87
                84 |         77        0.77       96.64
                85 |         56        0.56       97.20
                86 |         60        0.60       97.80
                87 |         43        0.43       98.23
                88 |         37        0.37       98.60
                89 |         36        0.36       98.96
                90 |         31        0.31       99.27
                91 |         15        0.15       99.42
                92 |         19        0.19       99.61
                93 |         13        0.13       99.74
                94 |          6        0.06       99.80
                95 |         10        0.10       99.90
                96 |          6        0.06       99.96
                97 |          4        0.04      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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