请帮忙理解这句英文
Annual bike sales doubled between 1960 and 1970,and there are nearly 70 million bikes in the US today.
That is more than two for every three automobiles
这最后一句怎么理解,前面一段是说自行车的增长,后面这一句是把电动车和自行车比较,请问这里的more than 怎么理解呢,好像不能理解成"比..多;不止"的意思,请问最后一句怎么翻译呢?