Speaking of a weak analogy Aussiemark, sales figures in the USA from 2008 to Feb 2013 - over 6700 GTR's have been sold. I doubt very much that anything even close to 10% of that figure (670 GTR's) have been sold here in Australia, so the ratio of 1:15 - meaning roughly 450 GTR's sold here in Australia since 2009, is a very very realistic assumption considering they're even rarer than hens teeth on the roads
http://www.gtrlife.com/forums/topic/82201-february-2013-gtr-sales-report/