HI! Because these are the years when I'm sure they're together. Example the period 2001/2007 is the one that leads to marriage and the period of marriage itself; same thing as 1998/1999. I don't know much about the 80s, because I didn't even exist, lol. But in the end, for me it's ok, any episode that will serve to increase my collection,
By the way, sorry for my English not perfect,