Mortgage Relief-Clarify the Finance Bill please?

Hi, I'm a bit embarressed to admit I dont quite understand the new interest relief being applied to first time buyers who bought from 2004 to 2008.

We bought in 2006 and have €327,000 remaining on our mortage and our current interest rate is 1.95% tracker. We are jointly assessed.

Are these calculations correct?

€327,000*1.95% = €6375.50*30%=€1912.95/12 =€159 PER MONTH.

If this is right, do we recieve the 30% until 2017?

thanks.

there is a very good chart/tables on the Revenue website which shows the rates, year, cap which might help. sorry i dont know how to highlight particular website.

Is this it Dewdrop?

http://www.revenue.ie/en/tax/it/reliefs/tax-relief-source-mortgage-rates.html

I'm still not sure if I am calculating the relief correctly though?