Frequencies for first 10,000 rows of age variable in nhamcsed1994 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        431        4.31        4.31
          1 |        337        3.37        7.68
          2 |        263        2.63       10.31
          3 |        202        2.02       12.33
          4 |        153        1.53       13.86
          5 |        159        1.59       15.45
          6 |        103        1.03       16.48
          7 |        110        1.10       17.58
          8 |        112        1.12       18.70
          9 |         88        0.88       19.58
         10 |        112        1.12       20.70
         11 |         87        0.87       21.57
         12 |         90        0.90       22.47
         13 |         96        0.96       23.43
         14 |        134        1.34       24.77
         15 |        101        1.01       25.78
         16 |        121        1.21       26.99
         17 |        165        1.65       28.64
         18 |        146        1.46       30.10
         19 |        154        1.54       31.64
         20 |        161        1.61       33.25
         21 |        167        1.67       34.92
         22 |        187        1.87       36.79
         23 |        164        1.64       38.43
         24 |        183        1.83       40.26
         25 |        179        1.79       42.05
         26 |        196        1.96       44.01
         27 |        186        1.86       45.87
         28 |        197        1.97       47.84
         29 |        159        1.59       49.43
         30 |        214        2.14       51.57
         31 |        154        1.54       53.11
         32 |        190        1.90       55.01
         33 |        156        1.56       56.57
         34 |        169        1.69       58.26
         35 |        173        1.73       59.99
         36 |        149        1.49       61.48
         37 |        156        1.56       63.04
         38 |        141        1.41       64.45
         39 |        158        1.58       66.03
         40 |        130        1.30       67.33
         41 |        140        1.40       68.73
         42 |        134        1.34       70.07
         43 |        121        1.21       71.28
         44 |        116        1.16       72.44
         45 |        108        1.08       73.52
         46 |        106        1.06       74.58
         47 |         96        0.96       75.54
         48 |         94        0.94       76.48
         49 |         85        0.85       77.33
         50 |         82        0.82       78.15
         51 |         83        0.83       78.98
         52 |         77        0.77       79.75
         53 |         74        0.74       80.49
         54 |         66        0.66       81.15
         55 |         62        0.62       81.77
         56 |         80        0.80       82.57
         57 |         67        0.67       83.24
         58 |         66        0.66       83.90
         59 |         66        0.66       84.56
         60 |         62        0.62       85.18
         61 |         67        0.67       85.85
         62 |         66        0.66       86.51
         63 |         54        0.54       87.05
         64 |         46        0.46       87.51
         65 |         60        0.60       88.11
         66 |         76        0.76       88.87
         67 |         51        0.51       89.38
         68 |         50        0.50       89.88
         69 |         53        0.53       90.41
         70 |         50        0.50       90.91
         71 |         57        0.57       91.48
         72 |         53        0.53       92.01
         73 |         56        0.56       92.57
         74 |         53        0.53       93.10
         75 |         52        0.52       93.62
         76 |         43        0.43       94.05
         77 |         53        0.53       94.58
         78 |         49        0.49       95.07
         79 |         47        0.47       95.54
         80 |         46        0.46       96.00
         81 |         43        0.43       96.43
         82 |         40        0.40       96.83
         83 |         49        0.49       97.32
         84 |         39        0.39       97.71
         85 |         38        0.38       98.09
         86 |         35        0.35       98.44
         87 |         32        0.32       98.76
         88 |         25        0.25       99.01
         89 |         19        0.19       99.20
         90 |         22        0.22       99.42
         91 |         13        0.13       99.55
         92 |         13        0.13       99.68
         93 |          9        0.09       99.77
         94 |          5        0.05       99.82
         95 |          6        0.06       99.88
         96 |          4        0.04       99.92
         97 |          5        0.05       99.97
         98 |          2        0.02       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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