I am not disputing your figures but where is the source? Everything I see says that average age of readership is increasing & readership overall decreasing.
This is a good study, loads of date here
* Circulation of national newspaper titles has decreased from almost 30 million in 2003 to 12.4 million in 2017.
* National Sunday titles have gone from 13.9 to 5.4 million and national daily titles from 13.3 to 7 million.
* Among the two fifths of adults who claim to consume news through newspapers, the most-used titles are the Daily Mail (31%), Metro (23%), The Sun (21%) and The Mail on Sunday (20%).
* 16-24s are more likely than those aged 65+ to read more of the titles. Those aged 65+ are more likely than 16-24s to read the Daily Mail and The Mail on Sunday.
* EMGs are more likely than non-EMGs to read more of the titles. Non-EMGs are more likely to read The Mail on Sunday