Recreational walking is by far the most popular leisure activity in Britain: 16% of Britons do it each week compared with 11% who go to the gym.
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In the UK, some 45% of people smoked in the mid-1970s; now 21% do.
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The average Australian drinks 84 litres of beer a year; the global average is 27 litres.
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Over 30 million Europeans - or 6.9% of its population - suffer from depression.
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There’s been a 9 kg jump in the weight of the average American over the past 30 years.
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