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

  jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,508       95.08       95.08
          1 |        449        4.49       99.57
          2 |          4        0.04       99.61
          3 |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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