Frequencies for first 10,000 rows of pct012c051 variable in sf12000860us18 dataset :

   48 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,671       86.71       86.71
          1 |        990        9.90       96.61
          2 |        199        1.99       98.60
          3 |         77        0.77       99.37
          4 |         26        0.26       99.63
          5 |         13        0.13       99.76
          6 |          5        0.05       99.81
          7 |          3        0.03       99.84
          8 |          3        0.03       99.87
          9 |          1        0.01       99.88
         10 |          1        0.01       99.89
         12 |          1        0.01       99.90
         16 |          1        0.01       99.91
         19 |          1        0.01       99.92
         23 |          1        0.01       99.93
         24 |          1        0.01       99.94
         27 |          1        0.01       99.95
         35 |          1        0.01       99.96
         45 |          1        0.01       99.97
         48 |          1        0.01       99.98
         54 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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