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

  jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,445       94.45       94.45
          1 |        514        5.14       99.59
          2 |          8        0.08       99.67
          3 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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