Yet since the last big Himalayan quake, in 1950, India's population has trebled and urbanised.
Borrowing from other forces, the number of officers on London's streets was almost trebled, to 16, 000.
China's imports from the region, primarily soy products and minerals, have nearly trebled since 2002.
All pensions must exceed the minimum wage, which has trebled in real terms since 1995.
By the Qing Dynasty there were 2, 000 hutong, and by the 1950s that total had almost trebled.
Obesity among six-year-olds has doubled in recent years to 8.5%, and trebled to 15% in 15-year-olds, the paper says.
In the seven elections from 1976 to 2000, the gap between top and bottom more than trebled to 14.3%.
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The Conservatives are arguing that the Liberal Democrats have trebled the county's debt, and that council tax has doubled.
Since the early 1980s, the rate of adult obesity in Britain has trebled.
But even after stock prices had trebled, Wall Street kept structuring deals that didn't make sense at the higher prices.
In Heaton Village, a neighbourhood of detached and semi-detached houses north-west of Manningham, the number of Pakistanis trebled between 1991 and 2001.
Mr Torgyan opposed next year's budget plan because his partners refused to let the agricultural part of it be more than trebled.
Since then, however, the share price has almost trebled, and Mr Schmidt is promising that profits will grow by 15% a year.
For instance, sales of Combinet, a remote-access firm, trebled under Cisco's stewardship.
In the same time, the number of patients awaiting transplants has trebled.
Since the last week of September the apparent risk of a Commerzbank default, on the basis of derivative prices, has nearly trebled (see chart).
The Republic of Ireland used to be more peaceful, although its murder rate has trebled in the past ten years and now stands at 62.
In the past 40 years, the number of working women in developed countries has nearly trebled, and women are on average working longer into their pregnancies.
Jocelyn Davies (Plaid Cymru, South Wales East) asked the first minister to review the homebuy scheme, as house prices in Wales have trebled over 20 years.
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The number of women applying to join the board trebled in 2012 after the changes were made, and other organisations have been urged to follow its example.
The HM Inspectorate of Prisons made an unannounced inspection of HMP Highpoint two months after it was revealed that cannabis levels had trebled in a year.
Granted, that is small beer, given that prices have trebled since the central London property market took off after Britain was ejected from the exchange-rate mechanism in 1992.
Immigration by students has almost trebled in the past decade.
The court system's translation budget had trebled in five years.
When asked to give to a highly worthy cause (to help emotionally disturbed children), the donation rate trebled if donors were offered a product in exchange for their gift.
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Dr Roy said the number of cases of tonsil cancer in young men has more than trebled in the past 20 years and more than doubled in young woman.
The Faroe Islands, midway between Britain and Iceland, got in on the act and trebled their quota to 85, 000 tonnes, pushing the total catch way above the ICES limit.
He said the pain of the Dowler family had been "trebled" by the hacking of voice mail messages of their missing teenage daughter, Milly, who turned out to have been murdered.
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