Frequencies for first 10,000 rows of pct012m125 variable in sf12000860us28 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,769       97.69       97.69
          1 |        186        1.86       99.55
          2 |         35        0.35       99.90
          3 |          2        0.02       99.92
          4 |          4        0.04       99.96
          5 |          1        0.01       99.97
          6 |          1        0.01       99.98
          7 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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