Frequencies for first 10,000 rows of pct012d097 variable in sf12010880us23 dataset :

   94 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,824       98.24       98.24
          1 |        145        1.45       99.69
          2 |         18        0.18       99.87
          3 |          4        0.04       99.91
          4 |          5        0.05       99.96
          5 |          2        0.02       99.98
          6 |          1        0.01       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017