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

  jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,490       94.90       94.90
          1 |        470        4.70       99.60
          2 |          6        0.06       99.66
          3 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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