Frequencies for first 10,000 rows of j_knife variable in vehicle dataset :

  Jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,494       94.94       94.94
          1 |        463        4.63       99.57
          2 |         13        0.13       99.70
          3 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016