这个句子如何剖析呢，省略句怎么样运用

In most countries the cosplayt of crude oil now account for a smaller share of the price of petrol than it did in the 1970s

In most countries 地址状语 the cosplayt of crude oil 主语 now 时间状语 account for 谓语动词 a smaller share of the price of petrol 宾语 than it did in the 1970s 比较状语从句（it 指代 the cosplayt of crude oil, did 替代 accounted for, 宾语为比较对应项需要省略，in the 1970s为时间状语）

翻译：在大部分国家里，原油本钱目前在汽油价格中所占的份额小于上世纪70年代时。