"high increase" is a correct and usable phrase in written English.
You can use it when referring to a significant increase in something, such as "There was a high increase in sales this quarter."
This seems an excessively high increase, and I cannot believe this represents true market rate.
"We're seeing a very high increase in the number of calls that H.R. call centers are handling from employees saying, 'Where's my money?' " he said.
Some medical practices that used X-rays as therapeutic agents were abandoned because of the high increase in the risk of leukemia.
Further, all tested drugs caused high increase in the relative% of basophils when compared to control.
Because of scarcity in resources, there is a high increase in efficiency.
Due to the high increase in cardiovascular diseases, preventive measures to eliminate them were defined.
Both scientific journals and patent databases record a high increase in publications in this area.
The simulation results performed for constant panel temperature showed a high increase in heat output.
A high increase in new-home construction and growth policies not overburdened by regulation acted as price reliefs in Raleigh.
The ambulance service said there has been a "high increase" in delays in admitting patients due to NHS pressure.
A high increase of the oxygen evolution overvoltage could also be seen.
