Frequencies for first 10,000 rows of pct012n171 variable in sf12000860us29 dataset :

   64 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,756       97.56       97.56
          1 |        189        1.89       99.45
          2 |         34        0.34       99.79
          3 |          7        0.07       99.86
          4 |          7        0.07       99.93
          5 |          1        0.01       99.94
          6 |          1        0.01       99.95
          7 |          2        0.02       99.97
         13 |          1        0.01       99.98
         15 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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