The phrase "an ever-increasing proportion of" is correct and usable in written English.
It can be used to describe a growing percentage or share of something over time.
Example: "An ever-increasing proportion of the population is becoming more aware of environmental issues."
Alternatives: "a growing share of" or "an expanding percentage of".
It is expected that the number of very old (85 and over) persons will especially continue to increase and occupy an ever-increasing proportion of the overall population [ 1].
Overall occurrence in the population above 65 years of age is estimated to 6-86-8%d is expected to increase significantly worldwide due to changing demographic profiles with an ever-increasing proportion of elderly (Ferri et al., 2005).
They will also be home to an ever-increasing proportion of the world's population.
So developed economies are spending an ever-increasing proportion of their wealth on services.
But mostly I look for work, like an ever-increasing proportion of everyone I knew from school, college and university.
We've all seen the Congressional Budget Office projections that show Medicare and Medicaid accounting for an ever-increasing proportion of the federal budget.
The modeling of cross-country stock holdings is motivated by evidence that a large and ever-increasing proportion of currency flows has been directed toward national stock markets.
The ever-increasing proportion of vulnerable African populations who live in the above-mentioned unsanitary conditions is constantly at risk of cholera outbreaks [ 2].
Such an approach begins to meet the needs of a population containing an ever increasing proportion of these excluded groups, whilst providing opportunities to manufacturers to maximise the available market for any given product.
Demographically we are an ageing and an increasingly obese society which, with increased accessibility, means that buildings are likely to be frequented by an ever increasing proportion of persons with reduced mobility.
