Frequencies for first 10,000 rows of pct012n055 variable in sf12000860us29 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,475       94.75       94.75
          1 |        385        3.85       98.60
          2 |         78        0.78       99.38
          3 |         26        0.26       99.64
          4 |         10        0.10       99.74
          5 |         10        0.10       99.84
          6 |          4        0.04       99.88
          7 |          2        0.02       99.90
          9 |          1        0.01       99.91
         10 |          2        0.02       99.93
         12 |          1        0.01       99.94
         14 |          1        0.01       99.95
         16 |          2        0.02       99.97
         18 |          1        0.01       99.98
         21 |          1        0.01       99.99
         22 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017