Frequencies for first 10,000 rows of pct012k116 variable in sf12010880us30 dataset :

    9 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,269       92.69       92.69
          1 |        552        5.52       98.21
          2 |        113        1.13       99.34
          3 |         33        0.33       99.67
          4 |         18        0.18       99.85
          5 |          6        0.06       99.91
          6 |          4        0.04       99.95
          7 |          2        0.02       99.97
         10 |          1        0.01       99.98
         11 |          1        0.01       99.99
         38 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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