According to the U.S. DepartmentofLabor, in May 2015 there were 505,560 registered school bus drivers.
根据美国劳工部的统计,截止到2015年5月,登记在册的校车司机有505560人。
2
Although women's wages are improving, DepartmentofLabor statistics show that the ratio of their earnings with that of men have been roughly static since 1960.