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

  jackknife |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,406       94.06       94.06
          1 |        556        5.56       99.62
          2 |          5        0.05       99.67
          3 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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