Frequencies for first 10,000 rows of pct012m033 variable in sf12010860us32 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,692       96.92       96.92
          1 |        260        2.60       99.52
          2 |         35        0.35       99.87
          3 |          9        0.09       99.96
          4 |          3        0.03       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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