當動詞用: The number of Chinese visitors has risen since 2005. (*一直在增加，所以使用現在完成式)
當名詞用: There is a rise on the number of Chinese visitors.
當動詞用: The birth rate started to grow in 2010.
當動詞用: The number climbed in January.
當動詞用: The ratio has increased since 2010.
當名詞用: There was an increase on the number in 2001.
1.5 go up
當動詞用: The number of visitors has gone up since 2005.
當動詞用: The house prices in the States rocketed to the top of the 6 countries.
當動詞用: The number of Chinese visitors has fallen since 2005.
當名詞用: There is a fall on the number of Chinese visitors.
當動詞用: The average yearly income in Taiwan dropped from 5 million to 2 million in 2016.
當名詞用: There was a drop on the number of sales.
當動詞用: The proportion of iPhone usage has declined.
當名詞用: There was a decline on the proportion of iPhone usage.
當動詞用: The ratio has decreased since 2010.
當名詞用: There was an decrease on the number in 2001.
2.5 go down
當動詞用: The number of visitors has gone down since 2005.
當名詞用: We are expecting a plunge in profits this year.
2.7 plummet 暴跌
當動詞用: House prices have plummeted in recent months.
3.1 stay/remain/maintain + steady/constant/stable
The proportion remained stable in 2005.
例如: The number of visitors has rapidly dropped since 2005.
There was a significant decrease on the number of visitors.
4.1 急遽的 (表達短時間內極大的變化)
sharp / sharply
rapid / rapidly
steep / steeply (僅用於折線圖)
4.2 顯著的 (程度稍弱為急遽的)
significant / significantly
considerable / considerably
substantial / substantially
gradual / gradually
moderate / moderately
slight / slightly
slow / slowly (僅用於折線圖)
參考資料: Cambridge Dictionary