Frequencies for first 10,000 rows of pct012k062 variable in sf12010880us30 dataset :

   59 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,233       92.33       92.33
          1 |        625        6.25       98.58
          2 |        107        1.07       99.65
          3 |         19        0.19       99.84
          4 |          7        0.07       99.91
          5 |          5        0.05       99.96
          6 |          1        0.01       99.97
          7 |          1        0.01       99.98
         13 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017