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

        age |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         45        0.45        0.45
          1 |         60        0.60        1.05
          2 |         74        0.74        1.79
          3 |         68        0.68        2.47
          4 |         44        0.44        2.91
          5 |         47        0.47        3.38
          6 |         58        0.58        3.96
          7 |         63        0.63        4.59
          8 |         71        0.71        5.30
          9 |         81        0.81        6.11
         10 |         60        0.60        6.71
         11 |         63        0.63        7.34
         12 |         58        0.58        7.92
         13 |         53        0.53        8.45
         14 |         91        0.91        9.36
         15 |        135        1.35       10.71
         16 |        273        2.73       13.44
         17 |        304        3.04       16.48
         18 |        354        3.54       20.02
         19 |        324        3.24       23.26
         20 |        287        2.87       26.13
         21 |        293        2.93       29.06
         22 |        244        2.44       31.50
         23 |        233        2.33       33.83
         24 |        229        2.29       36.12
         25 |        216        2.16       38.28
         26 |        200        2.00       40.28
         27 |        152        1.52       41.80
         28 |        199        1.99       43.79
         29 |        200        2.00       45.79
         30 |        174        1.74       47.53
         31 |        157        1.57       49.10
         32 |        159        1.59       50.69
         33 |        170        1.70       52.39
         34 |        164        1.64       54.03
         35 |        140        1.40       55.43
         36 |        171        1.71       57.14
         37 |        151        1.51       58.65
         38 |        164        1.64       60.29
         39 |        156        1.56       61.85
         40 |        165        1.65       63.50
         41 |        159        1.59       65.09
         42 |        126        1.26       66.35
         43 |        150        1.50       67.85
         44 |        134        1.34       69.19
         45 |        128        1.28       70.47
         46 |        114        1.14       71.61
         47 |        119        1.19       72.80
         48 |        128        1.28       74.08
         49 |         98        0.98       75.06
         50 |        101        1.01       76.07
         51 |        130        1.30       77.37
         52 |         96        0.96       78.33
         53 |         89        0.89       79.22
         54 |         74        0.74       79.96
         55 |         86        0.86       80.82
         56 |         82        0.82       81.64
         57 |         66        0.66       82.30
         58 |         72        0.72       83.02
         59 |         56        0.56       83.58
         60 |         59        0.59       84.17
         61 |         51        0.51       84.68
         62 |         47        0.47       85.15
         63 |         50        0.50       85.65
         64 |         51        0.51       86.16
         65 |         56        0.56       86.72
         66 |         44        0.44       87.16
         67 |         38        0.38       87.54
         68 |         43        0.43       87.97
         69 |         55        0.55       88.52
         70 |         42        0.42       88.94
         71 |         61        0.61       89.55
         72 |         55        0.55       90.10
         73 |         47        0.47       90.57
         74 |         53        0.53       91.10
         75 |         41        0.41       91.51
         76 |         49        0.49       92.00
         77 |         53        0.53       92.53
         78 |         45        0.45       92.98
         79 |         40        0.40       93.38
         80 |         32        0.32       93.70
         81 |         33        0.33       94.03
         82 |         33        0.33       94.36
         83 |         29        0.29       94.65
         84 |         16        0.16       94.81
         85 |         25        0.25       95.06
         86 |         22        0.22       95.28
         87 |         21        0.21       95.49
         88 |         14        0.14       95.63
         89 |         12        0.12       95.75
         90 |          4        0.04       95.79
         91 |          4        0.04       95.83
         92 |          2        0.02       95.85
         93 |          1        0.01       95.86
         94 |          3        0.03       95.89
         95 |          1        0.01       95.90
         96 |          2        0.02       95.92
         97 |          1        0.01       95.93
         99 |        407        4.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016