Frequencies for first 10,000 rows of pct012g044 variable in sf12000860us22 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,855       68.55       68.55
          1 |      1,327       13.27       81.82
          2 |        602        6.02       87.84
          3 |        303        3.03       90.87
          4 |        184        1.84       92.71
          5 |        148        1.48       94.19
          6 |        106        1.06       95.25
          7 |         81        0.81       96.06
          8 |         64        0.64       96.70
          9 |         41        0.41       97.11
         10 |         32        0.32       97.43
         11 |         32        0.32       97.75
         12 |         21        0.21       97.96
         13 |         21        0.21       98.17
         14 |         16        0.16       98.33
         15 |         28        0.28       98.61
         16 |         13        0.13       98.74
         17 |         14        0.14       98.88
         18 |          9        0.09       98.97
         19 |          8        0.08       99.05
         20 |          2        0.02       99.07
         21 |          3        0.03       99.10
         22 |         11        0.11       99.21
         23 |         13        0.13       99.34
         24 |          1        0.01       99.35
         25 |          5        0.05       99.40
         26 |          6        0.06       99.46
         27 |          3        0.03       99.49
         28 |          5        0.05       99.54
         29 |          4        0.04       99.58
         30 |          3        0.03       99.61
         31 |          2        0.02       99.63
         32 |          1        0.01       99.64
         33 |          3        0.03       99.67
         34 |          3        0.03       99.70
         35 |          2        0.02       99.72
         36 |          3        0.03       99.75
         38 |          3        0.03       99.78
         39 |          2        0.02       99.80
         40 |          2        0.02       99.82
         41 |          1        0.01       99.83
         42 |          2        0.02       99.85
         44 |          1        0.01       99.86
         46 |          2        0.02       99.88
         47 |          1        0.01       99.89
         50 |          2        0.02       99.91
         52 |          1        0.01       99.92
         53 |          1        0.01       99.93
         55 |          1        0.01       99.94
         56 |          1        0.01       99.95
         60 |          1        0.01       99.96
         62 |          1        0.01       99.97
         64 |          1        0.01       99.98
         66 |          1        0.01       99.99
         89 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017