The Nissan GT-R did not follow traditional year to year sales starting dates like most cars. Normally in the US we see production year /model year start in the September before the model year, ie Sept 09 would be a 2010 model. Some cars don't adhere to this rule, and overseas they normally go by calendar year.
United States Sales 2008 -2009
147 - July 08
484 - August 08
421 - September 08
321 - October 08
208 - November 08
149 - December 08
94 - January 09
169 - February 09
137 - March 09
171 - April 09
146 - May 09
150 - June 09
Total 2597
United States Sales 2009-2010 though December
128 - July 09
100-August 09
111- September 09
117-October 09
92 -November 09
119 -December 09
Total 667
Source : NAGTROC