The phrase "a surprising increase in" is correct and usable in written English.
You can use it when discussing unexpected growth or rise in a particular area, such as statistics, sales, or performance metrics.
Example: "The company reported a surprising increase in quarterly profits, exceeding all expectations."
Alternatives: "an unexpected rise in" or "a notable surge in".
In February, Singapore reported a surprising increase in cases that seemed strongly associated with MoistureLoc shipped from Bausch's Greenville factory.
There was a surprising increase in participation among 16-21 year olds, who don't qualify for auto-enrolment.
Shares had been modestly higher at the start of trading on Friday after a surprising increase in February retail sales.
Markets were tugged in two directions by a surprising increase in sales of new homes, and by weaker earnings reports from the health insurance, telecommunications and retail sectors.
The biggest gainer among the Dow companies was General Motors, which rose $1.18, to $31.92, after reporting a surprising increase in August sales.
As marketers seek signs of a potential turnaround, one sign may be close at hand: a surprising increase in attendance at the conference.
Even so, that sales figure was down from $38.1 billion in 2008, which had been a surprising increase over the $25.7 billion in 2007 that defied sluggish economic trends.
The suggestion that the economy need slow only modestly to curb inflationary pressures is a result of the surprising increase in worker productivity over the last couple of years.
The suppression in electron-phonon coupling concomitantly increases group velocities and suppresses phonon scattering rates, surpassing the effects of alloy-disorder scattering and resulting in a surprising increased lattice thermal conductivity in the alloy.
A Global Insight economist, Patrick Newport, tempered his enthusiasm for the surprising increase in April's pending sales.
But, Mr. Farrahar said, the most surprising increase in Boston this year has been killings involving family members.
