The phrase "almost exclusively provided" is correct and usable in written English.
It can be used to describe a situation where something is mainly or primarily given or supplied, with only a few exceptions.
Example: "The service is almost exclusively provided by local vendors, ensuring a community-focused approach."
Alternatives: "primarily offered" or "mainly supplied".
"Such projects are almost exclusively provided by the voluntary sector, often arising from self-help groups," says Gill Keep, the institute's head of policy.
Research funding is almost exclusively provided by foreign donors and international agencies.
In rural hospitals, family physicians have almost exclusively provided care to hospitalized patients.
However, care for patients with diabetic complications, as well as peripheral vascular surgery and limb amputations, is almost exclusively provided by the public healthcare system.
Health care is almost exclusively provided through the NHS primary, secondary and tertiary services, which are tax-funded and free at the point of use.
At the same time, affordable formal primary care services are scarce, and what exists is almost exclusively provided by non-government organizations (NGOs) working on a project basis.
The unit will now almost exclusively provide financial advice and sell insurance and securities through brokers -- an approach already adopted by prominent competitors.
[C4.] Prudential Lays Off 160 Bankers Prudential Securities dismissed 160 investment bankers and will now almost exclusively provide financial advice and sell insurance and securities through brokers.
But it is not unreasonable to ask why British males of a certain age and demographic but from all backgrounds almost exclusively provide the talent pool for our legions of racists, football hooligans, rioters, gang members and terrorists.
Its unique assets, including a high volume of cancer patients and an ED that serves them almost exclusively, provide an excellent environment in which to study this group of patients.
A recent discovery of 970 human skeletons from mass burials dating to the height of the famine in Kilkenny City (1847 1851) provided an opportunity to study the skeletal manifestations of scurvy a disease that became widespread at this time due to the sudden lack of Vitamin C which had previously almost exclusively been provided by the potato.
