Frequencies for first 10,000 rows of pct012n201 variable in sf12010860us33 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,981       99.81       99.81
          1 |         14        0.14       99.95
          2 |          4        0.04       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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