Frequencies for first 10,000 rows of pct012n178 variable in sf12000860us29 dataset :

   71 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,802       98.02       98.02
          1 |        153        1.53       99.55
          2 |         24        0.24       99.79
          3 |          8        0.08       99.87
          4 |          7        0.07       99.94
          5 |          1        0.01       99.95
          6 |          1        0.01       99.96
          7 |          1        0.01       99.97
         11 |          1        0.01       99.98
         12 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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