The numbers are growing across racial and ethnic groups, except for Asian women, the study said.
There are also exaggerated doubts and fears about birth control pills, the study said.
Customers end up throwing away as much as half of what they buy, the study said.
The study said midwife-led care was in general much more likely to lead to a natural birth.
Moreover, sales promotions "frequently encourage customers to purchase excessive quantities, " which they don't eat, the study said.
The GPs in the study said they used placebos either because patients requested treatment or to reassure patients.
BBC: 'Most family doctors' have given a patient a placebo drug
Poor diet and lack of exercise caused 400, 000 deaths in 2000, 33% more than 1990, the study said.
But more of such tests should be done in people who have less severe symptoms, the study said.
"Frequent copying of signature whistles would ... render the identity information of the whistle unreliable, " the study said.
Reduced demand for Scottish exports in Europe has also contributed to the lack of movement, the study said.
The study said the government's decision to make languages non-compulsory for pupils over 14 was having an adverse effect.
BBC: NEWS | UK | Education | Big fall in university languages
The study said people on low incomes tended to spend their money locally and so small businesses would suffer.
The last Pisa study appeared to show England's performance had worsened, the study said, while Timms suggested the opposite.
Instead, the study said the bar had been lowered in search of loot.
Now, those temperatures cover about 10% of the land area, the study said.
The authors of the study said their findings should be treated with caution.
"Mental arithmetic is a more complex and challenging task, which more than 20% of people struggle with, " the study said.
This included a large number of newly diagnosed patients, 13% of whom were found to be multi-drug-resistant, the study said.
WSJ: Tuberculosis Strain in Mumbai Doesn't Respond to Main Treatment
Before the war started, from January 2002 to March 2003, about a half-dozen violent deaths were reported daily, the study said.
Previous research projects which have found declines in the number of new medicines focused on smaller periods of time, the study said.
The study said being "overweight was associated with significantly lower all-cause mortality".
Even when stacked up against other factors that contribute to life satisfaction, living in a greener area had a significant effect, the study said.
BBC: Green spaces boosts wellbeing of urban dwellers - study
Phenomena like La Nina have always been around, but large areas of extreme warming have only come about with climate change, the study said.
But the benefits at the time were outweighed by increased use of non-semiautomatic weapons, which the study said were used more frequently in crime.
The number of internal flights taken annually rose by 83m in 2003-10 and will rise by almost as much again by 2014, the study said.
Researchers involved in the study said the main reasons for the lower fatality rate in crashes are due to new redesigned front ends of S.U.V.
And in a 12-month period ending in June 2009, the majority of delays was concentrated in 26 metropolitan areas, or hub cities, the study said.
Better results were achieved in classrooms with vegetation, the study said.
Professor Shridhar Sathe of Florida State University, who worked on the study said more research was needed before the tests could be made widely available.
Another business to make the 16 best performers was Kenya's Equity Bank, which the study said had pioneered mobile banking in its nation's rural areas.
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