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

        age |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         49        0.49        0.49
          1 |         77        0.77        1.26
          2 |         91        0.91        2.17
          3 |         85        0.85        3.02
          4 |        105        1.05        4.07
          5 |         65        0.65        4.72
          6 |         59        0.59        5.31
          7 |         72        0.72        6.03
          8 |         60        0.60        6.63
          9 |         44        0.44        7.07
         10 |         67        0.67        7.74
         11 |         51        0.51        8.25
         12 |         68        0.68        8.93
         13 |         77        0.77        9.70
         14 |        114        1.14       10.84
         15 |        176        1.76       12.60
         16 |        277        2.77       15.37
         17 |        295        2.95       18.32
         18 |        331        3.31       21.63
         19 |        290        2.90       24.53
         20 |        266        2.66       27.19
         21 |        271        2.71       29.90
         22 |        240        2.40       32.30
         23 |        257        2.57       34.87
         24 |        211        2.11       36.98
         25 |        190        1.90       38.88
         26 |        213        2.13       41.01
         27 |        166        1.66       42.67
         28 |        206        2.06       44.73
         29 |        193        1.93       46.66
         30 |        208        2.08       48.74
         31 |        178        1.78       50.52
         32 |        173        1.73       52.25
         33 |        178        1.78       54.03
         34 |        202        2.02       56.05
         35 |        173        1.73       57.78
         36 |        185        1.85       59.63
         37 |        148        1.48       61.11
         38 |        137        1.37       62.48
         39 |        130        1.30       63.78
         40 |        146        1.46       65.24
         41 |        130        1.30       66.54
         42 |        127        1.27       67.81
         43 |        109        1.09       68.90
         44 |        125        1.25       70.15
         45 |        130        1.30       71.45
         46 |        123        1.23       72.68
         47 |        103        1.03       73.71
         48 |        100        1.00       74.71
         49 |         85        0.85       75.56
         50 |         89        0.89       76.45
         51 |         84        0.84       77.29
         52 |         94        0.94       78.23
         53 |         77        0.77       79.00
         54 |         79        0.79       79.79
         55 |         59        0.59       80.38
         56 |         70        0.70       81.08
         57 |         65        0.65       81.73
         58 |         47        0.47       82.20
         59 |         60        0.60       82.80
         60 |         44        0.44       83.24
         61 |         58        0.58       83.82
         62 |         67        0.67       84.49
         63 |         50        0.50       84.99
         64 |         48        0.48       85.47
         65 |         55        0.55       86.02
         66 |         53        0.53       86.55
         67 |         65        0.65       87.20
         68 |         49        0.49       87.69
         69 |         48        0.48       88.17
         70 |         50        0.50       88.67
         71 |         55        0.55       89.22
         72 |         50        0.50       89.72
         73 |         42        0.42       90.14
         74 |         57        0.57       90.71
         75 |         36        0.36       91.07
         76 |         39        0.39       91.46
         77 |         40        0.40       91.86
         78 |         30        0.30       92.16
         79 |         36        0.36       92.52
         80 |         45        0.45       92.97
         81 |         39        0.39       93.36
         82 |         42        0.42       93.78
         83 |         26        0.26       94.04
         84 |         37        0.37       94.41
         85 |         20        0.20       94.61
         86 |         19        0.19       94.80
         87 |         10        0.10       94.90
         88 |         13        0.13       95.03
         89 |          9        0.09       95.12
         90 |          5        0.05       95.17
         91 |          5        0.05       95.22
         92 |          6        0.06       95.28
         93 |          2        0.02       95.30
         95 |          1        0.01       95.31
         97 |          1        0.01       95.32
         99 |        468        4.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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