Frequencies for first 10,000 rows of pct012e028 variable in sf12010860us24 dataset :

   25 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,595       95.95       95.95
          1 |        326        3.26       99.21
          2 |         56        0.56       99.77
          3 |         14        0.14       99.91
          4 |          4        0.04       99.95
          5 |          3        0.03       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 , 17 Apr 2017