I can't tell because the online statement just states the net (of DIRT) interest payment and not also the gross amount. And because of the varying monthly balance I'm not quite sure how to manually calculate the gross amount.
It is possible to work it out, though it's tricky.
Example if you opened an account on Oct 1, 2008, putting in 1K per month:
Oct 08: 1,000 x 1/12 months x 0.0715 = 5.96 (Total 1,005.96)
Plus 1K deposit at start of Nov 08
Nov 08: 2,005.96 x 1/12 months x 0.0715 = 11.95 (Total 2,017.91)
Plus 1K deposit at start of Dec. Assume rate went from 7.15% to 6.40% on Dec 1.
Dec 08: 3,017.91 x 1/12 months x 0.064 = 16.09
Total Gross Interest = €34.00
Net of DIRT (if charged 20%) = €27.20; Net of DIRT (if charged 23%) = €26.18