Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table.

Bond		Coupon Rate				Price Quote				Maturity			Face Value
1			6.5	%			106.46			5	years		$	45,000,000
2			8.0				115.02			8	years			40,000,000
3			7.7				113.57			15.5	years			60,000,000
4			7.3				102.81			25	years			67,000,000

If the corporate tax rate is 25 percent, what is the aftertax cost of the companys debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)