Frequencies for first 10,000 rows of age variable in nhamcsopd1994 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        413        4.13        4.13
          1 |        232        2.32        6.45
          2 |        131        1.31        7.76
          3 |        109        1.09        8.85
          4 |        113        1.13        9.98
          5 |        106        1.06       11.04
          6 |         70        0.70       11.74
          7 |         73        0.73       12.47
          8 |         64        0.64       13.11
          9 |         83        0.83       13.94
         10 |         55        0.55       14.49
         11 |         68        0.68       15.17
         12 |         62        0.62       15.79
         13 |         65        0.65       16.44
         14 |         69        0.69       17.13
         15 |         88        0.88       18.01
         16 |        112        1.12       19.13
         17 |         96        0.96       20.09
         18 |        143        1.43       21.52
         19 |        166        1.66       23.18
         20 |        148        1.48       24.66
         21 |        171        1.71       26.37
         22 |        181        1.81       28.18
         23 |        185        1.85       30.03
         24 |        193        1.93       31.96
         25 |        192        1.92       33.88
         26 |        181        1.81       35.69
         27 |        173        1.73       37.42
         28 |        187        1.87       39.29
         29 |        196        1.96       41.25
         30 |        175        1.75       43.00
         31 |        179        1.79       44.79
         32 |        189        1.89       46.68
         33 |        175        1.75       48.43
         34 |        158        1.58       50.01
         35 |        169        1.69       51.70
         36 |        153        1.53       53.23
         37 |        164        1.64       54.87
         38 |        154        1.54       56.41
         39 |        154        1.54       57.95
         40 |        154        1.54       59.49
         41 |        161        1.61       61.10
         42 |        143        1.43       62.53
         43 |        167        1.67       64.20
         44 |        137        1.37       65.57
         45 |        121        1.21       66.78
         46 |        138        1.38       68.16
         47 |        125        1.25       69.41
         48 |        142        1.42       70.83
         49 |        112        1.12       71.95
         50 |        120        1.20       73.15
         51 |        117        1.17       74.32
         52 |        119        1.19       75.51
         53 |        108        1.08       76.59
         54 |        119        1.19       77.78
         55 |         98        0.98       78.76
         56 |        113        1.13       79.89
         57 |         93        0.93       80.82
         58 |         97        0.97       81.79
         59 |         89        0.89       82.68
         60 |         97        0.97       83.65
         61 |        100        1.00       84.65
         62 |         96        0.96       85.61
         63 |         81        0.81       86.42
         64 |        106        1.06       87.48
         65 |        103        1.03       88.51
         66 |         93        0.93       89.44
         67 |         77        0.77       90.21
         68 |         62        0.62       90.83
         69 |         66        0.66       91.49
         70 |         87        0.87       92.36
         71 |         71        0.71       93.07
         72 |         78        0.78       93.85
         73 |         57        0.57       94.42
         74 |         65        0.65       95.07
         75 |         59        0.59       95.66
         76 |         50        0.50       96.16
         77 |         44        0.44       96.60
         78 |         47        0.47       97.07
         79 |         36        0.36       97.43
         80 |         51        0.51       97.94
         81 |         34        0.34       98.28
         82 |         31        0.31       98.59
         83 |         25        0.25       98.84
         84 |         25        0.25       99.09
         85 |         13        0.13       99.22
         86 |         15        0.15       99.37
         87 |          9        0.09       99.46
         88 |          9        0.09       99.55
         89 |          5        0.05       99.60
         90 |          8        0.08       99.68
         91 |          9        0.09       99.77
         92 |          5        0.05       99.82
         93 |          8        0.08       99.90
         94 |          2        0.02       99.92
         95 |          2        0.02       99.94
         96 |          1        0.01       99.95
         97 |          3        0.03       99.98
         98 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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