"contribute increasingly" is a correct and usable phrase in written English.
This phrase is often used to indicate that someone (or something) is adding to a greater total over time, usually through a particular action or effort. For example, "The company's customers have been contributing increasingly to its profits over the past year."
Emerging economies, which contribute increasingly to global growth, are rightly demanding a greater say in decision-making.
The development and innovation in telecommunications contribute increasingly to the educational evolution through the use of services and technological tools.
In short, contemporary philosophers continue to contribute increasingly detailed and complex arguments on both sides of the debate.
Going forward, the high-growth economies of China and India are expected to contribute increasingly to mobile ad growth in Asia — with local and global brands keen to target their expanding middle classes.
Although young scientists and engineers contribute increasingly to the space exploration and development, we have not given adequate attention to the possible connections between the advanced technique and environmental consciousness.
Larger b-values in DWI acquisition generate a greater sensitivity for diffusion while with lower b-values gross motions within the target tissue, such as perfusion as well as extravascular and extracellular microcirculation, contribute increasingly to the received signal [11, 12, 13].
By contrast, News International has contributed increasingly less to News Corp.'s bottom line.
U.K. corporation taxes on non-oil activities are relatively light, although oil revenues have become very important, despite fluctuations, contributing increasingly to all tax revenue.
Still, paying subscribers contributed increasingly less to LinkedIn's revenue over the last year, falling to 27 percent for the first nine months of 2010, from 41 percent in 2009.
As the CEPR notes, China – which has persisted with a state-growth strategy, has contributed increasingly to world growth in the last decade, and has indeed taken up the mantle of the global economic locomotive as the US has faltered.
Yet for all of his groundbreaking musical accomplishments, he was perhaps better remembered as the cohost (with fellow musician Roy Clark) of Hee-Haw, an immensely popular cornball country-and-western television variety show (1969 86), to which he contributed increasingly less music and more comedy.
