Frequencies for first 10,000 rows of age variable in nhamcsopd2005 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    under one year |        463        4.63        4.63
                 1 |        270        2.70        7.33
                 2 |        157        1.57        8.90
                 3 |        152        1.52       10.42
                 4 |        149        1.49       11.91
                 5 |        147        1.47       13.38
                 6 |        117        1.17       14.55
                 7 |        109        1.09       15.64
                 8 |        104        1.04       16.68
                 9 |         99        0.99       17.67
                10 |        106        1.06       18.73
                11 |         83        0.83       19.56
                12 |         96        0.96       20.52
                13 |         93        0.93       21.45
                14 |        123        1.23       22.68
                15 |        113        1.13       23.81
                16 |        121        1.21       25.02
                17 |        140        1.40       26.42
                18 |        112        1.12       27.54
                19 |        138        1.38       28.92
                20 |        141        1.41       30.33
                21 |        148        1.48       31.81
                22 |        169        1.69       33.50
                23 |        131        1.31       34.81
                24 |        141        1.41       36.22
                25 |        147        1.47       37.69
                26 |        134        1.34       39.03
                27 |        122        1.22       40.25
                28 |        136        1.36       41.61
                29 |        161        1.61       43.22
                30 |        119        1.19       44.41
                31 |        119        1.19       45.60
                32 |        127        1.27       46.87
                33 |        100        1.00       47.87
                34 |        100        1.00       48.87
                35 |        122        1.22       50.09
                36 |        119        1.19       51.28
                37 |        111        1.11       52.39
                38 |        113        1.13       53.52
                39 |        128        1.28       54.80
                40 |        125        1.25       56.05
                41 |        128        1.28       57.33
                42 |        133        1.33       58.66
                43 |        154        1.54       60.20
                44 |        152        1.52       61.72
                45 |        134        1.34       63.06
                46 |        130        1.30       64.36
                47 |        158        1.58       65.94
                48 |        127        1.27       67.21
                49 |        138        1.38       68.59
                50 |        130        1.30       69.89
                51 |        136        1.36       71.25
                52 |        139        1.39       72.64
                53 |        151        1.51       74.15
                54 |        125        1.25       75.40
                55 |        131        1.31       76.71
                56 |        134        1.34       78.05
                57 |        123        1.23       79.28
                58 |         99        0.99       80.27
                59 |        114        1.14       81.41
                60 |         98        0.98       82.39
                61 |         86        0.86       83.25
                62 |        126        1.26       84.51
                63 |         87        0.87       85.38
                64 |        102        1.02       86.40
                65 |         94        0.94       87.34
                66 |        101        1.01       88.35
                67 |         93        0.93       89.28
                68 |         71        0.71       89.99
                69 |         74        0.74       90.73
                70 |         75        0.75       91.48
                71 |         71        0.71       92.19
                72 |         72        0.72       92.91
                73 |         62        0.62       93.53
                74 |         68        0.68       94.21
                75 |         68        0.68       94.89
                76 |         65        0.65       95.54
                77 |         55        0.55       96.09
                78 |         43        0.43       96.52
                79 |         40        0.40       96.92
                80 |         38        0.38       97.30
                81 |         31        0.31       97.61
                82 |         33        0.33       97.94
                83 |         32        0.32       98.26
                84 |         30        0.30       98.56
                85 |         28        0.28       98.84
                86 |         23        0.23       99.07
                87 |         26        0.26       99.33
                88 |         14        0.14       99.47
                89 |         10        0.10       99.57
                90 |         12        0.12       99.69
                91 |          7        0.07       99.76
                92 |          4        0.04       99.80
                93 |          8        0.08       99.88
                95 |          3        0.03       99.91
                96 |          3        0.03       99.94
                97 |          1        0.01       99.95
                98 |          1        0.01       99.96
                99 |          1        0.01       99.97
100 years and over |          3        0.03      100.00
-------------------+-----------------------------------
             Total |     10,000      100.00

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