That is a bizarre assumption.
Am in the motor trade and if those kind of stats were available I would know about it.
I got this list from a guy in the motor trade;
Passenger: 2009 2008 over/under
Total Total Total
ALFA-ROMEO........16..........53..........-69.8%
AUDI...................450.........718........-37.3%
B.M.W. ..............268.......1476.......-81.8%
CHEVROLET..........40..........416........-90.4%
CHRYSLER..............6...........53..........-88.7%
CITROEN..............165........358.........-53.9%
DAIHATSU.............17.........140.........-87.9%
FIAT...................112.........258.........-56.6%
FORD..................2059.......4546........-54.7%
G.M.....................791........2320........-65.9%
HONDA.................314.........787........-60.1%
HYUNDAI..............365.......1302.........-72.0%
ISUZU...................0............0...........#DIV/0!
JAGUAR................20...........30...........-33.3%
KIA......................230.......533...........-56.8%
LAND ROVER...........12........312...........-96.2%
LEXUS...................46........286...........-83.9%
MAZDA................267........1146..........-76.7%
MERCEDES............221........1391.........-84.1%
MG/ROVER..............0............0...........#DIV/0!
MINI....................39..........265..........-85.3%
MITSUBSIHI..........115........498...........-76.9%
NISSAN...............1115......2383...........-53.2%
PEUGEOT..............307......1228............-75.0%
PORSCHE................1..........17.............-94.1%
PRIVATE IMPORTS...170.......230............-26.1%
RENAULT...............494......1348............-63.4%
SAAB......................9........230............-96.1%
SEAT....................149.......599............-75.1%
SKODA..................532......1182............-55.0%
SMART...................0...........0.............#DIV/0!
SUBARU.................45..........59.............-23.7%
SUZUKI.................121.......794.............-84.8%
TOYOTA...............1668.....4811............-65.3%
V.W......................986......3554............-72.3%
VOLVO....................81.......472.............-82.8%
Total:..................11231....33795...........-66.767%