Frequencies for first 10,000 rows of pct012n156 variable in sf12000860us29 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,421       94.21       94.21
          1 |        415        4.15       98.36
          2 |         85        0.85       99.21
          3 |         33        0.33       99.54
          4 |         13        0.13       99.67
          5 |         11        0.11       99.78
          6 |          5        0.05       99.83
          7 |          3        0.03       99.86
          8 |          3        0.03       99.89
          9 |          1        0.01       99.90
         11 |          3        0.03       99.93
         12 |          1        0.01       99.94
         13 |          1        0.01       99.95
         14 |          1        0.01       99.96
         17 |          1        0.01       99.97
         19 |          1        0.01       99.98
         21 |          1        0.01       99.99
         33 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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