In addition to price-weighted and value-weighted indexes, an equally weighted index is one in which the index value is computed from the average rate of return of the stocks comprising the index. Equally weighted indexes are frequently used by financial researchers to measure portfolio performance.

Suppose the following three defense stocks are to be combined into a stock index in January 2016 (perhaps a portfolio manager believes these stocks are an appropriate benchmark for his or her performance):

	Price
	Shares (millions)		1/1/16			1/1/17			1/1/18
Douglas McDonnell	540		$	62		$	62		$	81
Dynamics General	455			49			46			57
International Rockwell	290			78			85			81

What is the percentage rate of return on this index for the year ending December 31, 2016?

(Round your answer to 2 decimal places. Omit the "%" sign in your response.)