"a significant demographic" is a correct and usable phrase in written English.
It refers to a specific group of people that make up a notable portion of a larger population. Example: "The company's marketing strategy was tailored towards targeting a significant demographic - women aged 25-40 with disposable income."
Those numbers suggest a significant demographic shift in the bridge-playing public.
Their skills are unreliable at best, but, willy-nilly, they've caught a significant demographic moment.
And if the money really is gone, there will be a significant demographic shift within the expatriates who constitute the majority of the population.
But perhaps the most serious political challenge facing Pakistan concerns the conflict in Afghanistan, which, like the other disputes, also shares a significant demographic dimension.
That said, the old have always been around – it seems that perhaps 8% of the population of medieval England was over 60 – but not as a significant demographic group, rather as noticeable individuals.
The context, said the report, was a significant demographic transformation of Europe, with an inflow of migrants from the Middle East, north Africa and south Asia, which had implications for European culture, traditions and politics.
This genetic cost would be in addition to a potentially significant demographic cost (e.g. 24 82%) of fry abundance.
The results point to a lack of significant demographic impact (at least in the maternal mtDNA side) of North Africa despite the close geographic proximity and eight centuries or Arabian colonization.
We find that people's CPS behaviors manifest a number of significant demographic associations, that can be revealed accurately from data captured in WiFi logs.
While not all schools that took part in 2008 could be recruited again in 2014, the 2014 survey successfully recruited two-thirds of the schools that took part in the earlier CHETS Wales study, and achieved a sample with no significant demographic differences to the original sample.
In the coming years, the labor force should grow at a more moderate pace, as significant demographic changes take hold.
