Frequencies for first 10,000 rows of pct012k004 variable in sf12010880us30 dataset :

     1 year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,315       93.15       93.15
          1 |        495        4.95       98.10
          2 |        114        1.14       99.24
          3 |         41        0.41       99.65
          4 |         19        0.19       99.84
          5 |          4        0.04       99.88
          6 |          5        0.05       99.93
          7 |          1        0.01       99.94
          8 |          1        0.01       99.95
          9 |          3        0.03       99.98
         10 |          1        0.01       99.99
         33 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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