Longevity in England and Wales above 90 years old

In 2012 there were almost half a million people aged 90+ living in England and Wales. They might only represent about 1% of the total population, but given that the number has increased 33% since 2002, they're likely to become a bigger part of Britain.
But a lot of people pass away between their 90th and 100th birthdays - the totals plummet from 453,000 people aged 90-99 to just 12,320 aged 100+.