Frequencies for first 10,000 rows of age variable in nhamcsopd1996 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        390        3.90        3.90
          1 |        189        1.89        5.79
          2 |        120        1.20        6.99
          3 |        120        1.20        8.19
          4 |         96        0.96        9.15
          5 |        110        1.10       10.25
          6 |         88        0.88       11.13
          7 |         94        0.94       12.07
          8 |         73        0.73       12.80
          9 |         66        0.66       13.46
         10 |         72        0.72       14.18
         11 |         58        0.58       14.76
         12 |         63        0.63       15.39
         13 |         66        0.66       16.05
         14 |         75        0.75       16.80
         15 |         79        0.79       17.59
         16 |        104        1.04       18.63
         17 |        128        1.28       19.91
         18 |        131        1.31       21.22
         19 |        144        1.44       22.66
         20 |        147        1.47       24.13
         21 |        145        1.45       25.58
         22 |        146        1.46       27.04
         23 |        141        1.41       28.45
         24 |        146        1.46       29.91
         25 |        141        1.41       31.32
         26 |        176        1.76       33.08
         27 |        137        1.37       34.45
         28 |        157        1.57       36.02
         29 |        149        1.49       37.51
         30 |        190        1.90       39.41
         31 |        172        1.72       41.13
         32 |        195        1.95       43.08
         33 |        169        1.69       44.77
         34 |        153        1.53       46.30
         35 |        141        1.41       47.71
         36 |        174        1.74       49.45
         37 |        176        1.76       51.21
         38 |        156        1.56       52.77
         39 |        152        1.52       54.29
         40 |        159        1.59       55.88
         41 |        140        1.40       57.28
         42 |        137        1.37       58.65
         43 |        147        1.47       60.12
         44 |        124        1.24       61.36
         45 |        131        1.31       62.67
         46 |        127        1.27       63.94
         47 |        123        1.23       65.17
         48 |        144        1.44       66.61
         49 |        140        1.40       68.01
         50 |        106        1.06       69.07
         51 |        115        1.15       70.22
         52 |        126        1.26       71.48
         53 |        123        1.23       72.71
         54 |        136        1.36       74.07
         55 |        103        1.03       75.10
         56 |        110        1.10       76.20
         57 |        104        1.04       77.24
         58 |        113        1.13       78.37
         59 |        128        1.28       79.65
         60 |         99        0.99       80.64
         61 |        101        1.01       81.65
         62 |        108        1.08       82.73
         63 |        101        1.01       83.74
         64 |         94        0.94       84.68
         65 |        114        1.14       85.82
         66 |         90        0.90       86.72
         67 |         93        0.93       87.65
         68 |         99        0.99       88.64
         69 |        103        1.03       89.67
         70 |         82        0.82       90.49
         71 |         81        0.81       91.30
         72 |         69        0.69       91.99
         73 |        111        1.11       93.10
         74 |         78        0.78       93.88
         75 |         73        0.73       94.61
         76 |         66        0.66       95.27
         77 |         52        0.52       95.79
         78 |         50        0.50       96.29
         79 |         49        0.49       96.78
         80 |         46        0.46       97.24
         81 |         40        0.40       97.64
         82 |         36        0.36       98.00
         83 |         31        0.31       98.31
         84 |         22        0.22       98.53
         85 |         31        0.31       98.84
         86 |         26        0.26       99.10
         87 |         19        0.19       99.29
         88 |         22        0.22       99.51
         89 |          7        0.07       99.58
         90 |         18        0.18       99.76
         91 |          7        0.07       99.83
         92 |          6        0.06       99.89
         93 |          3        0.03       99.92
         94 |          4        0.04       99.96
         96 |          2        0.02       99.98
         97 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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