Frequencies for first 10,000 rows of j_knife variable in vehicle dataset : Jackknife | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,398 93.98 93.98 1 | 552 5.52 99.50 2 | 23 0.23 99.73 3 | 27 0.27 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016