This year the Cubs are in the World Series for the first time in more than 70 years. Next, the team will try and win it all for the first time since 1908.

Cubs fans talk about wanting to see just one World Series win in their lifetime. With a losing streak at 108 years, the team is getting close to not having anyone left who was alive for that last win.

How do we know? The World Series mortality tracker — a tool we built to show how many Americans were alive following every Series win by every Major League Baseball team — tells the tale. If you rifle through all of the teams, you see not just the rise and fall of franchise empires, but the rise and fall of the American population and, hence, potential fans.

You can’t help but notice, though, that the Cubs’ line is particularly bleak. Every year the number of people who could say "My team won!" is rapidly dwindling.