Frequencies for first 10,000 rows of age variable in nhamcsed1999 dataset :

    patient age in |
             years |      Freq.     Percent        Cum.
-------------------+-----------------------------------
    Under one year |        336        3.36        3.36
                 1 |        285        2.85        6.21
                 2 |        224        2.24        8.45
                 3 |        163        1.63       10.08
                 4 |        133        1.33       11.41
                 5 |        122        1.22       12.63
                 6 |        114        1.14       13.77
                 7 |        104        1.04       14.81
                 8 |         95        0.95       15.76
                 9 |         91        0.91       16.67
                10 |         69        0.69       17.36
                11 |         72        0.72       18.08
                12 |         83        0.83       18.91
                13 |         78        0.78       19.69
                14 |         77        0.77       20.46
                15 |        122        1.22       21.68
                16 |        116        1.16       22.84
                17 |        124        1.24       24.08
                18 |        124        1.24       25.32
                19 |        168        1.68       27.00
                20 |        162        1.62       28.62
                21 |        136        1.36       29.98
                22 |        156        1.56       31.54
                23 |        166        1.66       33.20
                24 |        147        1.47       34.67
                25 |        156        1.56       36.23
                26 |        162        1.62       37.85
                27 |        166        1.66       39.51
                28 |        177        1.77       41.28
                29 |        187        1.87       43.15
                30 |        145        1.45       44.60
                31 |        156        1.56       46.16
                32 |        161        1.61       47.77
                33 |        155        1.55       49.32
                34 |        175        1.75       51.07
                35 |        170        1.70       52.77
                36 |        176        1.76       54.53
                37 |        191        1.91       56.44
                38 |        182        1.82       58.26
                39 |        170        1.70       59.96
                40 |        159        1.59       61.55
                41 |        158        1.58       63.13
                42 |        174        1.74       64.87
                43 |        159        1.59       66.46
                44 |        130        1.30       67.76
                45 |        167        1.67       69.43
                46 |        117        1.17       70.60
                47 |        116        1.16       71.76
                48 |        109        1.09       72.85
                49 |        120        1.20       74.05
                50 |        117        1.17       75.22
                51 |        118        1.18       76.40
                52 |         90        0.90       77.30
                53 |         93        0.93       78.23
                54 |         76        0.76       78.99
                55 |         87        0.87       79.86
                56 |         78        0.78       80.64
                57 |         72        0.72       81.36
                58 |         87        0.87       82.23
                59 |         67        0.67       82.90
                60 |         73        0.73       83.63
                61 |         53        0.53       84.16
                62 |         65        0.65       84.81
                63 |         65        0.65       85.46
                64 |         54        0.54       86.00
                65 |         55        0.55       86.55
                66 |         58        0.58       87.13
                67 |         58        0.58       87.71
                68 |         47        0.47       88.18
                69 |         57        0.57       88.75
                70 |         58        0.58       89.33
                71 |         65        0.65       89.98
                72 |         70        0.70       90.68
                73 |         58        0.58       91.26
                74 |         59        0.59       91.85
                75 |         65        0.65       92.50
                76 |         59        0.59       93.09
                77 |         65        0.65       93.74
                78 |         59        0.59       94.33
                79 |         57        0.57       94.90
                80 |         61        0.61       95.51
                81 |         52        0.52       96.03
                82 |         50        0.50       96.53
                83 |         38        0.38       96.91
                84 |         53        0.53       97.44
                85 |         40        0.40       97.84
                86 |         33        0.33       98.17
                87 |         23        0.23       98.40
                88 |         43        0.43       98.83
                89 |         26        0.26       99.09
                90 |         16        0.16       99.25
                91 |         21        0.21       99.46
                92 |         14        0.14       99.60
                93 |          8        0.08       99.68
                94 |         13        0.13       99.81
                95 |          6        0.06       99.87
                96 |          2        0.02       99.89
                97 |          2        0.02       99.91
                98 |          3        0.03       99.94
                99 |          4        0.04       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