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

  jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,516       95.16       95.16
          1 |        427        4.27       99.43
          2 |         14        0.14       99.57
          3 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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