Frequencies for first 10,000 rows of pct012k028 variable in sf12000860us26 dataset :

   25 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,958       89.58       89.58
          1 |        743        7.43       97.01
          2 |        185        1.85       98.86
          3 |         55        0.55       99.41
          4 |         14        0.14       99.55
          5 |         13        0.13       99.68
          6 |         10        0.10       99.78
          7 |          3        0.03       99.81
          9 |          3        0.03       99.84
         10 |          4        0.04       99.88
         12 |          1        0.01       99.89
         14 |          2        0.02       99.91
         16 |          1        0.01       99.92
         21 |          1        0.01       99.93
         29 |          1        0.01       99.94
         34 |          1        0.01       99.95
         37 |          1        0.01       99.96
         39 |          1        0.01       99.97
         63 |          1        0.01       99.98
         65 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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