2005
the x means it is a 1999
http://www.ukcar.com/features/reg_year.htm
A vehicle with a prefix letter R was first registered with the DVLA between 01 Aug 1997 and 30 Jul 1998. So between 12 and 13 years old in 2010. A vehicle with a suffix letter R would have been...
R registration in England means that the car was made in 1998.