Frequencies for first 10,000 rows of pct012k081 variable in sf12000860us26 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,808       98.08       98.08
          1 |        172        1.72       99.80
          2 |          8        0.08       99.88
          3 |          6        0.06       99.94
          5 |          1        0.01       99.95
          6 |          3        0.03       99.98
          7 |          1        0.01       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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