Cambelt change interval ?

Hello,



quick question about cambelt change times, i have recently bough a 2000 reg renault laguna 1.9dci and looking at a reciept it had a new cambelt on 6 july 2009 when the car was on 79k, it is now on 108k so only done about 30k since that date and on each mot its only done 6k a year everytime, am i worrying about nothing or will it be time for a cambelt change soonish ?



thanks.