Here is a close estimate of the VIN ranges for each model year. These numbers are very close to the actual number of Crossfires produced since there are very few gaps in the sequence. Note that the earliest assigned number is 14.

2004 4X000014 - 4X025452
2005 5X025453 - 5X061056
2006 6X061057 - 6X069949
2007 7X069950 - 7X070560 (to date)

It was the 05 model year with 35K units produced that makes you wonder what DCX was thinking.

I would bet that the assembly line stops somewhere around 75K units.