Frequencies for first 10,000 rows of pct012m122 variable in sf12010860us32 dataset :

   15 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,820       98.20       98.20
          1 |        159        1.59       99.79
          2 |         17        0.17       99.96
          3 |          3        0.03       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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