Unless it's one of very few terms where people are going to search for things from previous years ("best films of 2010," "election results 2004," etc.), change the year on the existing article.
As others have mentioned, yes, creating a new article that is verbatim identically except for the year will generally cause issues with getting the content indexed due to duplicate content issues.
More importantly, creating a new article at a new URL and keeping the old one live is a waste of whatever backlinks you have pointed at the page for the previous year. If you write a new article at a new URL and leave the old one unchanged, your new page would be starting over (basically) in terms of link building. Those old links would now be pointed at a page optimized for an outdated term that no one is searching for anymore (despite what keyword research tools may tell you; they can take a while to update from a previous year's data).