If you apply the Heading 1 style (which you can modify) to your years at the top of the page, they will automatically appear in a Table of Contents.

If not using a TOC, which is the easiest method, ...
Select each year and add a Bookmark with the appropriate name (must start with a letter, not a number, in the name, so could use y2009 as a name but not 2009). Then on your title page or index page, insert a hyperlink or cross-reference to the appropriate bookmark.