Frequencies for first 10,000 rows of age variable in nhamcsed1996 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        335        3.35        3.35
          1 |        301        3.01        6.36
          2 |        203        2.03        8.39
          3 |        187        1.87       10.26
          4 |        144        1.44       11.70
          5 |        137        1.37       13.07
          6 |        136        1.36       14.43
          7 |         89        0.89       15.32
          8 |         87        0.87       16.19
          9 |         85        0.85       17.04
         10 |         70        0.70       17.74
         11 |         87        0.87       18.61
         12 |         94        0.94       19.55
         13 |         80        0.80       20.35
         14 |        100        1.00       21.35
         15 |        106        1.06       22.41
         16 |        128        1.28       23.69
         17 |        147        1.47       25.16
         18 |        152        1.52       26.68
         19 |        145        1.45       28.13
         20 |        169        1.69       29.82
         21 |        149        1.49       31.31
         22 |        160        1.60       32.91
         23 |        163        1.63       34.54
         24 |        173        1.73       36.27
         25 |        173        1.73       38.00
         26 |        196        1.96       39.96
         27 |        185        1.85       41.81
         28 |        188        1.88       43.69
         29 |        156        1.56       45.25
         30 |        186        1.86       47.11
         31 |        190        1.90       49.01
         32 |        213        2.13       51.14
         33 |        179        1.79       52.93
         34 |        195        1.95       54.88
         35 |        163        1.63       56.51
         36 |        149        1.49       58.00
         37 |        150        1.50       59.50
         38 |        150        1.50       61.00
         39 |        171        1.71       62.71
         40 |        171        1.71       64.42
         41 |        152        1.52       65.94
         42 |        135        1.35       67.29
         43 |        139        1.39       68.68
         44 |        122        1.22       69.90
         45 |        107        1.07       70.97
         46 |         95        0.95       71.92
         47 |        123        1.23       73.15
         48 |        112        1.12       74.27
         49 |        117        1.17       75.44
         50 |         88        0.88       76.32
         51 |         80        0.80       77.12
         52 |         89        0.89       78.01
         53 |         83        0.83       78.84
         54 |         88        0.88       79.72
         55 |         72        0.72       80.44
         56 |         66        0.66       81.10
         57 |         66        0.66       81.76
         58 |         68        0.68       82.44
         59 |         65        0.65       83.09
         60 |         58        0.58       83.67
         61 |         63        0.63       84.30
         62 |         70        0.70       85.00
         63 |         50        0.50       85.50
         64 |         53        0.53       86.03
         65 |         61        0.61       86.64
         66 |         68        0.68       87.32
         67 |         52        0.52       87.84
         68 |         52        0.52       88.36
         69 |         50        0.50       88.86
         70 |         60        0.60       89.46
         71 |         68        0.68       90.14
         72 |         86        0.86       91.00
         73 |         73        0.73       91.73
         74 |         67        0.67       92.40
         75 |         65        0.65       93.05
         76 |         47        0.47       93.52
         77 |         72        0.72       94.24
         78 |         53        0.53       94.77
         79 |         49        0.49       95.26
         80 |         55        0.55       95.81
         81 |         59        0.59       96.40
         82 |         49        0.49       96.89
         83 |         42        0.42       97.31
         84 |         39        0.39       97.70
         85 |         36        0.36       98.06
         86 |         39        0.39       98.45
         87 |         32        0.32       98.77
         88 |         26        0.26       99.03
         89 |         20        0.20       99.23
         90 |         17        0.17       99.40
         91 |         14        0.14       99.54
         92 |         15        0.15       99.69
         93 |          5        0.05       99.74
         94 |          7        0.07       99.81
         95 |          6        0.06       99.87
         96 |          3        0.03       99.90
         97 |          5        0.05       99.95
         98 |          4        0.04       99.99
        103 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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