Frequencies for first 10,000 rows of pct012k110 variable in sf12010880us30 dataset :

    3 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,319       93.19       93.19
          1 |        519        5.19       98.38
          2 |         95        0.95       99.33
          3 |         38        0.38       99.71
          4 |         14        0.14       99.85
          5 |          6        0.06       99.91
          6 |          1        0.01       99.92
          7 |          2        0.02       99.94
          8 |          1        0.01       99.95
          9 |          2        0.02       99.97
         11 |          1        0.01       99.98
         21 |          1        0.01       99.99
         36 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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