I really liked the layout which was very user friendly, but had a couple of hiccups with the links. When you click on a year (reference in material) it takes you to the reference page of the site, but there is no "back" button to take you back to where you were. Kind of bothersome but not insurmountable. The other was the links for the examples. According to the instructions, it should have taken me to a page to see the example, but nothing happened.
Very nice work and very easy to follow. Great job overall.