Crikey, that was 19 years ago already? No wonder I've got a stiff neck! Apologies -- I'd misread the OP to say that it had been the largest jump in 15 years --

Crikey, that was 19 years ago already? No wonder I've got a stiff neck! Apologies -- I'd misread the OP to say that it had been the largest jump in 15 years -- meaning the 15 years prior to 1999.