Here you go Infose. Methodologies (at least in the US) change as to how CPI is calculated. Which is what I believe (part of?) danhoff's point.
This link has a nice chart showing inflation as calculated using current vs older methodology.
http://www.shadowstats.com/alternate_data/inflation-charts
And an item from the 'mainstream' press referencing the above.
http://www.cnbc.com/id/42551209
I have no axe to grind, just trying to shed some light.