Frequencies for first 10,000 rows of pct012o152 variable in sf12000860us30 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,303       73.03       73.03
          1 |      1,337       13.37       86.40
          2 |        526        5.26       91.66
          3 |        255        2.55       94.21
          4 |        184        1.84       96.05
          5 |         92        0.92       96.97
          6 |         69        0.69       97.66
          7 |         44        0.44       98.10
          8 |         49        0.49       98.59
          9 |         23        0.23       98.82
         10 |         21        0.21       99.03
         11 |         19        0.19       99.22
         12 |         13        0.13       99.35
         13 |         13        0.13       99.48
         14 |          6        0.06       99.54
         15 |          6        0.06       99.60
         16 |          7        0.07       99.67
         17 |          3        0.03       99.70
         18 |          4        0.04       99.74
         19 |          2        0.02       99.76
         20 |          5        0.05       99.81
         21 |          1        0.01       99.82
         22 |          2        0.02       99.84
         24 |          4        0.04       99.88
         25 |          2        0.02       99.90
         26 |          3        0.03       99.93
         28 |          1        0.01       99.94
         32 |          2        0.02       99.96
         35 |          1        0.01       99.97
         43 |          1        0.01       99.98
         44 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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