Frequencies for first 10,000 rows of supchrgr variable in vindecode dataset : indicates | if the | engine has | a | supercharge | r or not. | Freq. Percent Cum. ------------+----------------------------------- | 7,789 77.89 77.89 N | 2,188 21.88 99.77 Y | 23 0.23 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016