I've just been doing a few fag-packet calcs with the aid of the Treasury's GDP deflator. Gold was £241 / oz in 1995; if this had risen in line with GDP growth it would now be £351 / oz, whereas it's actually at £998 - 2.84 x the 'constant value' price.
But when I use the price I paid for my house in 1995 compared to market worth today, it comes out at 3.12 x the 'constant value' price - still ahead of gold.
And that's a bit of a surprise. Ideas anyone?