Frequencies for first 10,000 rows of pct012e145 variable in sf12000860us20 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,720       97.20       97.20
          1 |        257        2.57       99.77
          2 |         21        0.21       99.98
          3 |          1        0.01       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017