Frequencies for first 10,000 rows of age variable in cowbo19ages dataset :

        Age |      Freq.     Percent        Cum.
------------+-----------------------------------
    0 years |        457        4.57        4.57
  1-4 years |        572        5.72       10.29
  5-9 years |        610        6.10       16.39
10-14 years |        595        5.95       22.34
15-19 years |        621        6.21       28.55
20-24 years |        607        6.07       34.62
25-29 years |        604        6.04       40.66
30-34 years |        554        5.54       46.20
35-39 years |        544        5.44       51.64
40-44 years |        592        5.92       57.56
45-49 years |        548        5.48       63.04
50-54 years |        529        5.29       68.33
55-59 years |        505        5.05       73.38
60-64 years |        488        4.88       78.26
65-69 years |        461        4.61       82.87
70-74 years |        459        4.59       87.46
75-79 years |        427        4.27       91.73
80-84 years |        410        4.10       95.83
  85+ years |        417        4.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 2 May 2017