This is an example of Jonquil from 2007. It could pass for Yellow but Yellow normally does not have clear portions in the glass. (Actually, this is a trait more common to Lemon but I have been told that this is Jonquil.) Jonquil was used mainly for glass animals and other pressed items in 2007.
I received additional information from Katie Trippe in late October of 2012. She said all Yellow has some Crystal because Yellow is cased over Crystal and I suppose sometimes the Crystal shows through. So, at this point I am hard pressed to say if this is Jonquil or Yellow.