Frequencies for first 10,000 rows of age variable in nhamcsopd1995 dataset :

patient age |
   in years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        435        4.35        4.35
          1 |        212        2.12        6.47
          2 |        132        1.32        7.79
          3 |         84        0.84        8.63
          4 |        120        1.20        9.83
          5 |        128        1.28       11.11
          6 |         86        0.86       11.97
          7 |         93        0.93       12.90
          8 |         54        0.54       13.44
          9 |         72        0.72       14.16
         10 |         82        0.82       14.98
         11 |         75        0.75       15.73
         12 |         70        0.70       16.43
         13 |         87        0.87       17.30
         14 |        103        1.03       18.33
         15 |         74        0.74       19.07
         16 |        113        1.13       20.20
         17 |        134        1.34       21.54
         18 |        149        1.49       23.03
         19 |        119        1.19       24.22
         20 |        138        1.38       25.60
         21 |        153        1.53       27.13
         22 |        151        1.51       28.64
         23 |        140        1.40       30.04
         24 |        156        1.56       31.60
         25 |        161        1.61       33.21
         26 |        138        1.38       34.59
         27 |        163        1.63       36.22
         28 |        162        1.62       37.84
         29 |        143        1.43       39.27
         30 |        158        1.58       40.85
         31 |        180        1.80       42.65
         32 |        177        1.77       44.42
         33 |        165        1.65       46.07
         34 |        170        1.70       47.77
         35 |        180        1.80       49.57
         36 |        154        1.54       51.11
         37 |        154        1.54       52.65
         38 |        190        1.90       54.55
         39 |        179        1.79       56.34
         40 |        151        1.51       57.85
         41 |        149        1.49       59.34
         42 |        141        1.41       60.75
         43 |        129        1.29       62.04
         44 |        125        1.25       63.29
         45 |        130        1.30       64.59
         46 |        117        1.17       65.76
         47 |        129        1.29       67.05
         48 |        137        1.37       68.42
         49 |        117        1.17       69.59
         50 |        119        1.19       70.78
         51 |         96        0.96       71.74
         52 |        133        1.33       73.07
         53 |        119        1.19       74.26
         54 |        101        1.01       75.27
         55 |        104        1.04       76.31
         56 |        103        1.03       77.34
         57 |         92        0.92       78.26
         58 |        115        1.15       79.41
         59 |         94        0.94       80.35
         60 |         94        0.94       81.29
         61 |        101        1.01       82.30
         62 |        129        1.29       83.59
         63 |         79        0.79       84.38
         64 |         91        0.91       85.29
         65 |         93        0.93       86.22
         66 |        101        1.01       87.23
         67 |         83        0.83       88.06
         68 |         93        0.93       88.99
         69 |         80        0.80       89.79
         70 |         95        0.95       90.74
         71 |         76        0.76       91.50
         72 |         79        0.79       92.29
         73 |         73        0.73       93.02
         74 |         84        0.84       93.86
         75 |         59        0.59       94.45
         76 |         68        0.68       95.13
         77 |         63        0.63       95.76
         78 |         62        0.62       96.38
         79 |         44        0.44       96.82
         80 |         36        0.36       97.18
         81 |         35        0.35       97.53
         82 |         49        0.49       98.02
         83 |         25        0.25       98.27
         84 |         40        0.40       98.67
         85 |         33        0.33       99.00
         86 |         22        0.22       99.22
         87 |         17        0.17       99.39
         88 |         15        0.15       99.54
         89 |         12        0.12       99.66
         90 |          6        0.06       99.72
         91 |          9        0.09       99.81
         92 |          5        0.05       99.86
         93 |          2        0.02       99.88
         94 |          9        0.09       99.97
         97 |          1        0.01       99.98
         98 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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