美国四家汽车制造商生产一辆汽车所花费的时间

The chart below gives information on the amount of time taken to manufacture a vehicle by four US-based car producers between 1998 and 2002. Provide an overview of the information by identifying and describing the key details, and include comparisons where appropriate. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.