Talk:Just Dance 2018/@comment-35405040-20171226232321/@comment-24264457-20171227000533

However, if you subtract 2009 from 2018 you are not counting 2009. If you count the years themselves, like: etc, etc,
 * 1) 2009
 * 2) 2010
 * 3) 2011

You get 10 years.