Frequencies for first 10,000 rows of turbo_t variable in vindecode dataset : indicates if the engine has a | turbocharger. yes, no or | unknown. | Freq. Percent Cum. ------------------------------+----------------------------------- | 7,515 75.15 75.15 No | 1,960 19.60 94.75 Turbocharged with Intercooler | 10 0.10 94.85 Unknown | 1 0.01 94.86 Yes | 514 5.14 100.00 ------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016