The phrase "attributable mostly to" is correct and usable in written English.
It can be used when discussing the primary causes or reasons for a particular outcome or situation.
Example: "The increase in sales this quarter is attributable mostly to our new marketing strategy."
Alternatives: "primarily due to" or "largely as a result of".
In its report, the G.A.O. said the problems were attributable mostly to a difficult working environment and rapid turnover among security personnel at many airports.
Operating profits in North America improved 15%, attributable mostly to cost cutting.
These changes were attributable mostly to the larger share of CE immigrants with a graduate degree and the smaller share not speaking English or French.
Experts say the shift is attributable mostly to demographic and economic factors.
Considering only the b-like alleles of S. invicta, a greater than 3-fold excess of coding-region substitutions exists, attributable mostly to augmented variation in the first and second codon positions.
The first peak, which occurs around the year 2000, describes the past epidemic attributable mostly to exposure via primary transmission in the MM genotype and has a reasonably tight credibility range as this is fitted to data.
Among Japanese, the significantly lower mortality rate compared to Whites was partially attributable to disease characteristics but mostly to sociodemographic factors (primarily SEER region).
Some of the wage inequality is attributable to mostly men filling the senior staff positions, which have higher salaries, in McConnell's office.
We find that this small subpopulation spends on average over $23,000 year, or nearly 3.5 times the mean value, on medical care attributable to T1D, mostly attributable to the fourfold increase in hospital inpatient expenditures.
They said the split was instead "mostly" attributable to their desire to "preserve what is beautiful and special about the band and have it stay that way..
Rowena Mason, deputy political editor: The chancellor blames the lower growth forecasts for next year on higher predicted inflation and economic uncertainty, mostly attributable to the vote to leave the EU.
