Frequencies for first 10,000 rows of pct012f207 variable in sf12000860us21 dataset :

 100 to 104 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,923       99.23       99.23
          1 |         57        0.57       99.80
          2 |         14        0.14       99.94
          3 |          4        0.04       99.98
          4 |          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