Frequencies for first 10,000 rows of pct012m137 variable in sf12010860us32 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,711       97.11       97.11
          1 |        248        2.48       99.59
          2 |         34        0.34       99.93
          3 |          4        0.04       99.97
          4 |          1        0.01       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