The phrase "a marginal increase over" is correct and usable in written English.
It can be used when discussing a small or slight increase in a particular measurement or statistic compared to a previous value.
Example: "The report indicated a marginal increase over last year's sales figures, suggesting a slow but steady growth in the market."
Alternatives: "a slight rise compared to" or "a small uptick from".
"Despite the tragedy, the industry ended the year with 6.9 million North Americans cruising, a marginal increase over 2000".
But the 475 pages of ads that appeared from January to June this year are only a marginal increase over the approximately 437 pages the magazine had for the period in 2000.
This rating represents only a marginal increase over the 4.3 rating in 2013, and underscores Tunisians' belief that their country has a long way to go to becoming fully democratic.
That's a marginal increase over last year, when the average trip was 815 miles, and average spending $494.
This number represents a marginal increase over the expected 1% of positive subjects based on the threshold adopted in our assay and, if extrapolated to the whole NIRAD cohort, would bring the potential prevalence of autoantibody-positive subjects with adult-onset diabetes up from the original 4.5% (11) to 5.9%.
Within this case study, the CO2 emissions could be lowered significantly by accepting a marginal increase of costs over their global minimum.
Last year we anticipated that global vehicle sales would be challenged and that was just what happened, with global passenger vehicle sales limping to a marginal increase of just over 400,000 units in 2018.
The Bayesian skyline plot indicates a marginal increase in population size over the last 40,000 years, compatible with the hypothesis that there was no substantial change in red fox population size during the last glacial maximum and into the Holocene.
This effect represents a significant marginal increase over significant temporal trends in FOBT screening and significant differences in screening between provinces, as indicated by the time and group coefficients, respectively.
David Palmer-Jones, the chief executive of Suez recycling and recovery in the UK, said England is trailing behind the EU after new figures show there has only been a marginal increase in recycling in England over the last two years.
There were 64 fewer suicides in 2012 than in 2011 and a slight reduction in the overall suicide rate per 100,000, from 11.8 to 11.6, despite a marginal increase in the male rate from 18.1 over the same period.
