The phrase "a steady proportion" is correct and usable in written English.
It can be used when discussing a consistent or stable ratio between two or more quantities.
Example: "The study found that there is a steady proportion of students who prefer online learning over traditional classroom settings."
Alternatives: "a consistent ratio" or "an even distribution".
Pro-marijuana defenders have madefendersairly steady proportion of thavelectorate the past few years, after a large uptick since 1990.
During the first phase of the coalition, the Lib Dems rapidly shed support to Labour, but a very steady proportion of voters stuck with the Tories.
The carbon fixation within the Equatorial Pacific is well balanced with diatom and coccolithophore production contributing a relatively steady proportion of the total primary production.
The steady proportion of women who did not receive prenatal care and ARV prophylaxis, and the increasing trend of injection drug use during pregnancy among IDUs, both indicate that outreach programs are not reaching all women.
Early approximation can lead to unreliable results because it is valid only at earlier stages of the epidemics and in the limit where the proportion p of initially infected is much smaller than the intrinsic steady proportion (R0 – 1) / R0 of the epidemics (Appendix).
Barcelonès Nord-Maresme and Centre, which showed a steady, but high, proportion of second-eye surgeries, are regions with a substantial population density, which is mostly urban, and and are also adjacent to the city of Barcelona.
However, there was a steady decline in the proportion agreeing and a corresponding increase in the proportion answering "don't know," indicating an erosion in public awareness about radon (15% in 1990 to 27% in 1997).
There has been a steady decline in the proportion of cases in patients aged < 15 y, whereas the proportion in patients aged ≥ 25 y has increased in recent years; in 2010, 92.8% of cases were in patients aged ≥ 15 y (76.4% in those aged ≥ 25 y).
This study has revealed a steady decline in the proportion of teenage mothers who delivered at MNH from 1999 to 2005, and a steady rise in the proportion of older (30 34 years) mothers.
