The phrase "a dramatic decline from" is correct and usable in written English.
It can be used to describe a significant decrease in a particular metric or value compared to a previous point in time or another reference point.
Example: "The company experienced a dramatic decline from last year's profits, leading to concerns about its financial stability."
Alternatives: "a significant drop from" or "a steep fall from".
They found a dramatic decline from the Soltani et al. investigation in 2009.
In the SE Gotland Basin between 1979 and 2005, a dramatic decline from good to poor status occurred around 1998.
Those numbers represented a dramatic decline from previous days when Hezbollah sent 100 to 150 rockets a day across the border.
That's a dramatic decline from the peak of 315 new sentences recorded in 1996 at the height of the moral panic around murder rates in big cities and the crack cocaine epidemic.
Curry averaged 13.2 points and 4.7 rebounds in 59 games this season, a dramatic decline from his career-best averages of 19.5 points and 7 rebounds in 2006-7.
BlackBerry said it will report quarterly revenue of about $1.6 billion, a dramatic decline from $3.1 billion in the first quarter.
This, combined with postponement of marriage (mostly due to the lack of farmland required for young couples), brought about a dramatic decline in fertility--from 8.5 children per woman in 1983 to 6.2 in 1992.
A10 SCIENCE/HEALTH H.I.V.'s Racial Divide AIDS is still a killer among African-Americans despite a dramatic decline in death rates from H.I.V./AIDS in the United States over the last eight years.
Rubber farming has been blamed for a dramatic decline in fog frequency from the 1950s to the 1980s in Xishuangbanna, the study reported; the leading scientific theory is that rubber trees, which have especially deep roots, pull water from subsoils faster than trees in a rainforest would.
In contrast to most sub-Saharan African countries, Uganda reported a dramatic decline in HIV prevalence, from about 18% in 1992 [ 1] to about 4.1% in 2003 [ 2].
Second, the data from the veterans showed a dramatic decline in the NAA/Ch ratio from the anterior pixels, with the NAA/Ch ratio reaching a value of 0.6, more than 2 SDs from the control mean.
