Example sentences of "[noun] have doubled over the " in BNC.

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1 People know there is no tourism policy , and the number of personnel has doubled over the last years , but are we getting better services ?
2 And yet the proportion of women going out to work has doubled over the last thirty-five years ( from 30% to 60% between 1951 and 1987 ) , and almost all this increase is in part-time work .
3 Mrs Copeland pointed out that Bangor is a designated ‘ growth centre ’ , its population having doubled over the past 25 years .
4 The official Photochemical-Oxidant Review Group believes levels have doubled over the last 100 years , as a result of industrialisation .
5 ‘ Staff numbers had doubled over the previous five to six years and a programme of change had been thrust upon us by the market , ’ explained .
6 The number of companies mentioning environmental issues in their annual reports has doubled over the last year to around 18 per cent of the total .
7 Yet prostatic cancer is remarkably common ; coming third in cancer incidence after lung cancer and skin cancer in men , cases have doubled over the past 30 years and , according to experts , look set to double again by the year 2020 .
8 The amount of rhino horn entering Yemen has doubled over the last 20 months , apparently as a result of increased poaching activity in Zimbabwe and Swaziland .
9 The company , whose stock market value has doubled over the past year , is currently valued at about £9700m .
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