Frequencies for first 10,000 rows of pct012o096 variable in sf12000860us30 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,926       99.26       99.26
          1 |         69        0.69       99.95
          2 |          4        0.04       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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