Frequencies for first 10,000 rows of pct012c159 variable in sf12000860us18 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,666       86.66       86.66
          1 |        976        9.76       96.42
          2 |        234        2.34       98.76
          3 |         53        0.53       99.29
          4 |         33        0.33       99.62
          5 |          9        0.09       99.71
          6 |          4        0.04       99.75
          7 |          6        0.06       99.81
          8 |          5        0.05       99.86
          9 |          1        0.01       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
         65 |          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