...but how many Big Macs will it buy?

There was a conversation about investment at work that mentioned stocks, gold and the "Big Mac Index" so I decided to do a quick analysis.

Year	Big Mac	DJIA	Big Macs per DJIA	$/oz Gold	Big Macs per oz Gold
2001	$2.54	10790	4248	271	106
2002	$2.49	10259	4120	278	111
2003	$2.65	8601	3245	343	129
2004	$2.90	10409	3589	417	143
2005	$3.15	10827	3437	428	135
2006	$3.15	10883	3454	530	168
2007	$3.22	12474	3873	640	198

It didn't quite work out the way I had expected it to. Plotting the CPI (or the Euro) against these numbers might also be interesting.