Frequencies for first 10,000 rows of pct012k159 variable in sf12000860us26 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,827       88.27       88.27
          1 |        899        8.99       97.26
          2 |        187        1.87       99.13
          3 |         33        0.33       99.46
          4 |         23        0.23       99.69
          5 |          5        0.05       99.74
          6 |          2        0.02       99.76
          7 |          6        0.06       99.82
          8 |          5        0.05       99.87
         10 |          2        0.02       99.89
         11 |          2        0.02       99.91
         19 |          1        0.01       99.92
         22 |          2        0.02       99.94
         30 |          2        0.02       99.96
         33 |          1        0.01       99.97
         45 |          1        0.01       99.98
         64 |          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