Download the full pdf here
Explaining the data:
The main figure comes from the Council of Mortgage Lenders from Dec 2011,http://www.cml.org.uk/cml/
publications/ newsandviews/104/390. The restriction to those under-30 is because at older ages people are more likely to be ‘returners’ (i.e. we are less confident that they are truly first-time buyers).