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

        age |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         40        0.40        0.40
          1 |         68        0.68        1.08
          2 |         56        0.56        1.64
          3 |         50        0.50        2.14
          4 |         57        0.57        2.71
          5 |         52        0.52        3.23
          6 |         42        0.42        3.65
          7 |         37        0.37        4.02
          8 |         46        0.46        4.48
          9 |         53        0.53        5.01
         10 |         43        0.43        5.44
         11 |         45        0.45        5.89
         12 |         49        0.49        6.38
         13 |         54        0.54        6.92
         14 |         75        0.75        7.67
         15 |         94        0.94        8.61
         16 |        171        1.71       10.32
         17 |        200        2.00       12.32
         18 |        324        3.24       15.56
         19 |        294        2.94       18.50
         20 |        283        2.83       21.33
         21 |        249        2.49       23.82
         22 |        231        2.31       26.13
         23 |        269        2.69       28.82
         24 |        222        2.22       31.04
         25 |        224        2.24       33.28
         26 |        208        2.08       35.36
         27 |        223        2.23       37.59
         28 |        189        1.89       39.48
         29 |        171        1.71       41.19
         30 |        158        1.58       42.77
         31 |        156        1.56       44.33
         32 |        153        1.53       45.86
         33 |        140        1.40       47.26
         34 |        135        1.35       48.61
         35 |        144        1.44       50.05
         36 |        149        1.49       51.54
         37 |        150        1.50       53.04
         38 |        142        1.42       54.46
         39 |        140        1.40       55.86
         40 |        138        1.38       57.24
         41 |        127        1.27       58.51
         42 |        138        1.38       59.89
         43 |        155        1.55       61.44
         44 |        135        1.35       62.79
         45 |        158        1.58       64.37
         46 |        150        1.50       65.87
         47 |        133        1.33       67.20
         48 |        126        1.26       68.46
         49 |        143        1.43       69.89
         50 |        153        1.53       71.42
         51 |        129        1.29       72.71
         52 |        128        1.28       73.99
         53 |        131        1.31       75.30
         54 |        124        1.24       76.54
         55 |        115        1.15       77.69
         56 |        102        1.02       78.71
         57 |         93        0.93       79.64
         58 |        111        1.11       80.75
         59 |        103        1.03       81.78
         60 |         96        0.96       82.74
         61 |         87        0.87       83.61
         62 |         88        0.88       84.49
         63 |         69        0.69       85.18
         64 |         61        0.61       85.79
         65 |         71        0.71       86.50
         66 |         49        0.49       86.99
         67 |         70        0.70       87.69
         68 |         55        0.55       88.24
         69 |         54        0.54       88.78
         70 |         42        0.42       89.20
         71 |         46        0.46       89.66
         72 |         40        0.40       90.06
         73 |         41        0.41       90.47
         74 |         49        0.49       90.96
         75 |         40        0.40       91.36
         76 |         34        0.34       91.70
         77 |         27        0.27       91.97
         78 |         32        0.32       92.29
         79 |         33        0.33       92.62
         80 |         37        0.37       92.99
         81 |         35        0.35       93.34
         82 |         33        0.33       93.67
         83 |         26        0.26       93.93
         84 |         36        0.36       94.29
         85 |         26        0.26       94.55
         86 |         22        0.22       94.77
         87 |         21        0.21       94.98
         88 |         17        0.17       95.15
         89 |         16        0.16       95.31
         90 |         11        0.11       95.42
         91 |          8        0.08       95.50
         92 |          8        0.08       95.58
         93 |          3        0.03       95.61
         94 |          1        0.01       95.62
         95 |          3        0.03       95.65
         96 |          2        0.02       95.67
         97 |          1        0.01       95.68
        999 |        432        4.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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