Frequencies for first 10,000 rows of carbtype_t variable in vindecode dataset : the | description of | the polk | assigned code | which | identifies the | vehicle | carbureti | Freq. Percent Cum. ---------------+----------------------------------- | 2,642 26.42 26.42 Carburetor | 41 0.41 26.83 Electric (n/a) | 3 0.03 26.86 FUEL INJECTION | 2 0.02 26.88 Fuel Injection | 7,312 73.12 100.00 ---------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Oct 2016