Example sentences of "[noun] over the [adj] thirty years " in BNC.

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1 In fact the sequence of events was much more complex than that , although , as discussed earlier , many former patients were discharged to inadequate accommodation without aftercare , and progressive reduction of psychiatric beds over the past thirty years has contributed significantly to the problem .
2 Voluntary landscape agreements have not saved acres of hedgerows , heath or woodland and even those trees that remain in lowland England are an ageing population because insufficient planting has taken place over the past thirty years .
3 This very high degree of risk has been maintained for a long time as many studies over the past thirty years have shown .
4 He spoke on the transformation of literary criticism over the previous thirty years and , no doubt with the memory of John Peter 's interpretation of The Waste Land in mind , warned against too much psychological or biographical conjecture in the explication of poetry .
5 Every file , every data sheet on the exiles and émigrés who 'd caused trouble over the past thirty years was computerized and collated for him .
6 This absence is all the more surprising given that it is these very questions which have dominated much of Marxist cultural theory over the past thirty years .
7 Probabilistic models of language , which have been neglected by theoretical linguists over the past thirty years , are basic to our work .
8 This is significant , given that many commentators in 1983 thought that the policies of the Conservative and Labour parties were further apart than at any time over the previous thirty years .
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