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

  Jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,390       93.90       93.90
          1 |        561        5.61       99.51
          2 |         19        0.19       99.70
          3 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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