An automobile manufacturer has presented the following data for the past three years in its annual report. As a potential investor, you are interested in calculating yearly productivity and year to year productivity gains as one of several factors in your investment analysis. (Hint : Consider Labor & Cost)

2006

2005

2004

Unit car sales

2,800,000

2,500,000

2,200,000

Employees

102,000

103,000

105,000

Sales (billions $)

$ 59,000

$ 51,000

$ 48,000

Cost of Sales (billions $)

$ 49,000

$ 43,000

$ 42,000