Frequencies for first 10,000 rows of PCT012B102 variable in sf12000860us17 dataset :

   99 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,777       97.77       97.77
          1 |        189        1.89       99.66
          2 |         25        0.25       99.91
          3 |          6        0.06       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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