The study of 11, 161 people between the ages of 16 and 44 from across the UK found that a minority - one in five men and one in four women - have had one sexual partner over the course of their lives.
It has a one-to-one nurse-patient ratio in critical care and one-to-four in the rest.
After a 24-year Indonesian occupation, a referendum in East Timor had voted four-to-one in favour of independence.
Experience a whole new world in the heart of Orlando's famous amusement parks and attractions with a one-night stay for up to four people in a one-bedroom villa at the five-star Westgate Town Centre resort, just a mile from Disney World.
Nearly one-half of Republicans are investors, but so are more than one in four Democrats and one-third of independents.
For an inspiring tale of how some of these unsung heroes overcame the most daunting physical challenges of their age, see the four-part documentary Great Projects, to be shown on public television this summer in four one-hour segments.
He had a come-from-nowhere victory in the May 2007 primary--when he bested four other candidates, including two congressmen--then a four-to-one trouncing of his opponent in November.
He hit the headlines by taking 9-16 in an under-19 one-day match against Bangladesh during a four-nation tournament in Pakistan earlier this month.
This year they have returned with two cars, as against Audi's three, and their driving line-up includes four drivers who have previously competed in Formula One - but none of whom has previously raced at Le Mans.
Despite some of the flakiest mobile-network coverage in the developed world, one in four households has now gone mobile-only.
But the 29-year-old saw his four-shot overnight lead cut by one as American Ben Curtis fired six birdies in a six-under-par round of 64 to move second.
Pennetta came through 6-2 6-2 in one hour and four minutes and goes on to face fellow Italian Roberta Vinci or France's Virginie Razzano in round two.
"I know how desperate Ian has been to play an innings like that for us, " said Strauss, with England 1-0 up with one Test remaining in the four-Test series.
But ultimately Glamorgan missed out on promotion in the four-day game after failing to impress in the money-spinning one-day and Twenty20 competitions - tournaments that Glamorgan's board had demanded success to lure the lucrative corporate market.
The gap for reception age children is even closer - one in four, compared to just under one in five.
They then head off to India, where the pitches and weather will present very different challenges, for a series featuring two Tests and seven one-day internationals, before travelling to the West Indies in late January for four Tests and five one-day matches.
The Lexus' whirligig is familiar from the Toyota Camry and Avalon hybrids: a lean-burning Atkinson-cycle, 2.5-liter in-line four-cylinder (156 hp) coupled with two electric motors, one a 141-hp traction motor, the other a starter-generator.
WSJ: 2013 Lexus ES 300h Review: A Smooth, Elegant Guilt-Eraser | Rumble Seat by Dan Neil
The CSA collects regular payments from non-resident parents, but by October 2006 one in four applications for maintenance - received by the agency since 2003 - were still waiting to be cleared.
BBC: Parents and staff suffered during the CSA reforms, MPs say
Brazil has become one of the most entrepreneurial countries in the world, with one in four adults self-employed in some manner.
FORBES: Power Woman Dilma Rousseff: Brazil's Entrepreneur-In-Chief
MSG-3 is the third in a series of four satellites introduced in 2002, while the last one, MSG-4, will be launched in 2015.
Wales, Ireland and Northern Ireland have expressed an interest in joining England, Italy, Holland and Belgium in the competition, which would be played in two groups of four with a one-off final in the spring of 2009 and play-off matches for the other positions.
BBC: SPORT | Football | Non League | Euro Trophy event to be expanded
The government intervenes in fewer than one in four false-claims lawsuits, he added.
When Ceefax launched, it was rumoured that there were only four teletext-capable TV sets in the whole UK - one in the BBC director general's office, one for the director of engineering, one at Kingswood Warren and one in Colin McIntyre's home.
The double-lane road had been converted into a four-lane road with all traffic moving in one direction.
In recent years, one in four high-tech startups in America were founded by immigrants.
WHITEHOUSE: President Obama Speaks on Comprehensive Immigration Reform | The White House
Dendreon's treatment, Provenge, failed in two clinical trials, but a second look at the data revealed a four-month survival benefit in one of them.
Dendreon's (nasdaq: DNDN - news - people ) treatment, Provenge, failed in two clinical trials, but a second look at the data revealed a four-month survival benefit in one of them.
With more than a hundred accredited diplomats, Iran's embassy in Managua - a massive compound surrounded by four-meter-high concrete walls lined with razor wire - is one of the largest diplomatic compounds in the world.
For example, Frances said DSM-5 would mislabel one in four people with chronic pain and irritable bowel syndrome with the DSM-5's newly created "somatic symptom disorder, " which is diagnosed when a person has spent at least six months steadily thinking of and being anxious about their medical illness.
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