Frequencies for first 10,000 rows of pct012k154 variable in sf12000860us26 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,823       88.23       88.23
          1 |        866        8.66       96.89
          2 |        207        2.07       98.96
          3 |         50        0.50       99.46
          4 |         24        0.24       99.70
          5 |          6        0.06       99.76
          6 |          4        0.04       99.80
          7 |          2        0.02       99.82
          8 |          4        0.04       99.86
          9 |          4        0.04       99.90
         15 |          1        0.01       99.91
         16 |          1        0.01       99.92
         25 |          1        0.01       99.93
         29 |          1        0.01       99.94
         36 |          1        0.01       99.95
         40 |          1        0.01       99.96
         41 |          1        0.01       99.97
         46 |          1        0.01       99.98
         56 |          1        0.01       99.99
         78 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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