OK sir. Now I understand what they are doing: they have given a bunch of nominal rates and they are converting them to annual effective rates, and they are compounding them semi-annualy:
So, what does that mean? It means as follows:
1-3.86% componded semi-annually is the same as 3.90% compounded annualy.
2-3.911% .................................................................3.95%...................................
3-3.95%....................................................................3.99%...................................
That's ALL it means. They are simply converting interest rates from compounded semi-annually to compounded annually. So, All the figures on the left hand side are equivalent to the right hand side when componded semi-annually. In other words, 3.95% compounded semi-annually is exactly the same as 3.99% componded annually.