It always bother me when people use a particular number of years to show and average. Being a suspicious bastard I always wonder if the didn't do longer because it would tend to disprove what they are trying to prove. Of course it is not always so. Similarly when they show graphs and the reverences are skewed to make the rise or fall seem greater or less again depending on what they are trying to prove.

It reminds me of the university who are always talking about global warming putting up information that was later proved to have been altered to rpove their argument. If a university will do it who else will? (University of East Anglia??)