One in five people in Britain die from smoking, more than 115, 000 every year.
One in five of all the calories consumed round the world come from wheat.
Shockingly, one in five companies globally said they had no innovation strategy at all.
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This includes Democrats (69% to 11%), independents (55%-29%), and even one in five Republicans (19%-56%).
One in five people employed in manufacturing in Britain now works for a foreign company.
One in five RV owners have the drivable kind, called motor homes (see pictures).
Surprisingly, fewer than one in five travelers reported using a laptop computer at the airport.
One in five British children and adults suffers from asthma, eczema and other allergic conditions.
Nearly half were related to staffing levels and one in five to patient safety.
In California, for much the same reason, only one in five homes is insured against earthquakes.
One in five said they did not know enough about the plans for their own future.
And only one in five knew that when interest rates rise, bond prices fall.
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Meanwhile, Steve Wright's programme is heard by one in five of all radio listeners each afternoon.
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The Financial Services Authority (FSA) said one in five UK adults had such an account.
About 17 percent, or one in five women, said they play online games in bed.
Overall, one in five said they prefer to take natural products to treat ailments.
They say one in five CSX employees is serving or has served in the Armed Forces.
One in five deaths is caused by smoking, including a third of cancer deaths.
Almost one in five (19%) consider that London offers the worst food of all UK destinations.
In the 1960's one in 10 children had eczema, but today it is one in five.
At the time, one in five babies born in the city died before their first birthday.
And only one in five said they would adjust that for appropriate cut-offs in children.
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In Central and South Eastern Europe, almost one in five young people are unemployed.
One in five children suffer from a mental health problem, according to a new report.
As many as one in five big firms has a full-time office devoted to the subject.
One in five children from London who were questioned said they were frightened of being bullied.
In a poll last month, only one in five Greeks said they planned to buy tickets.
In Britain, about one in five seven-year-olds gets off to a very poor start in reading.
Anti-viral drugs can help but there is no cure and one in five victims dies.
She also noted women held only one in five of the top jobs in sport.
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