Frequencies for first 10,000 rows of pct012n158 variable in sf12000860us29 dataset :

   51 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,476       94.76       94.76
          1 |        377        3.77       98.53
          2 |         73        0.73       99.26
          3 |         33        0.33       99.59
          4 |         15        0.15       99.74
          5 |          3        0.03       99.77
          6 |          6        0.06       99.83
          7 |          3        0.03       99.86
          8 |          6        0.06       99.92
          9 |          1        0.01       99.93
         11 |          1        0.01       99.94
         12 |          2        0.02       99.96
         16 |          1        0.01       99.97
         17 |          1        0.01       99.98
         22 |          1        0.01       99.99
         31 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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