decrease from … to …
p: decreased
fall from … to …
p: fell
decline from … to …
p: declined
drop from … to …
p: droped
dip from … to …
p: dipped
decrease/fall/drop/decline/dip by …
reduce
verb: to make something smaller or less in size, amount, or price
p & p.p: reduced
see/show/experience a decrease/decline/fall/drop/reduction/dip from … to …
p: saw / showed / experienced
reaching / hitting a low point
plunge
v: to decrease suddenly by a large amount
p: plunged
take a plunge
v: a sudden large decrease in the price, value etc of something
plummet
verb: to suddenly and quickly decrease in value or amount
p: plummeted