You are given the following information concerning three portfolios, the market portfolio, and the risk-free asset:

Portfolio	RP		P		P
X	12.0	%	33	%	1.95
Y	11.0		28		1.25
Z	7.3		18		0.60
Market	11.4		23		1.00
Risk-free	6.8		0		0

Assume that the correlation of returns on Portfolio Y to returns on the market is 0.84. What is the percentage of Portfolio Ys return that is driven by the market? (Round your answer to 4 decimal places.)

R-squared _____