Frequencies for first 10,000 rows of ufagecomb variable in natl2004 dataset :

   Father's |
   Combined |
      Age U |      Freq.     Percent        Cum.
------------+-----------------------------------
         13 |          1        0.01        0.01
         14 |          1        0.01        0.02
         16 |         12        0.12        0.14
         17 |         45        0.45        0.59
         18 |         97        0.97        1.56
         19 |        168        1.68        3.24
         20 |        286        2.86        6.10
         21 |        356        3.56        9.66
         22 |        361        3.61       13.27
         23 |        439        4.39       17.66
         24 |        461        4.61       22.27
         25 |        495        4.95       27.22
         26 |        491        4.91       32.13
         27 |        477        4.77       36.90
         28 |        509        5.09       41.99
         29 |        488        4.88       46.87
         30 |        448        4.48       51.35
         31 |        412        4.12       55.47
         32 |        429        4.29       59.76
         33 |        420        4.20       63.96
         34 |        387        3.87       67.83
         35 |        359        3.59       71.42
         36 |        261        2.61       74.03
         37 |        238        2.38       76.41
         38 |        225        2.25       78.66
         39 |        207        2.07       80.73
         40 |        179        1.79       82.52
         41 |        179        1.79       84.31
         42 |        139        1.39       85.70
         43 |        108        1.08       86.78
         44 |        102        1.02       87.80
         45 |         60        0.60       88.40
         46 |         55        0.55       88.95
         47 |         35        0.35       89.30
         48 |         30        0.30       89.60
         49 |         18        0.18       89.78
         50 |         30        0.30       90.08
         51 |         14        0.14       90.22
         52 |          7        0.07       90.29
         53 |          4        0.04       90.33
         54 |          9        0.09       90.42
         55 |          8        0.08       90.50
         56 |          4        0.04       90.54
         57 |          4        0.04       90.58
         58 |          5        0.05       90.63
         59 |          8        0.08       90.71
         61 |          2        0.02       90.73
         63 |          1        0.01       90.74
         65 |          1        0.01       90.75
         67 |          1        0.01       90.76
         69 |          1        0.01       90.77
         72 |          1        0.01       90.78
         99 |        922        9.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 21 Jan 2016