Frequencies for first 10,000 rows of fftot10 variable in h126f dataset :

 TOTAL # OF |
  VISITS IN |
   FF AFTER |
       2009 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        150        1.50        1.50
         -1 |      9,819       98.19       99.69
          0 |         26        0.26       99.95
          1 |          2        0.02       99.97
          5 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Feb 2018