Eight percent more cars are in circulation this year than last year. Stats show that as of June of 1998, 1,226,642 cars were in circulation. As of June 1999, there were 1,334,109 in circulation. Private cars in circulation went from 331,292 in 1998 to 359,900 in 1999. In 1998, there were 635,973 motorcycles in circulation. In 1999, there are 689,959. The Direcci?n General de Impuestos Internos has announced most vehicles will need to renew their permission to circulate by the end of this month.