Not every year earns a vintage from Veuve Clicquot. 2015 did — the 67th since Madame Clicquot created the category in 1810, and a portion of it aged in oak to prove the point.
Veuve Clicquot only declares a vintage in years its chef de cave considers exceptional — 2015 was the 67th time that's happened since the house created the category two centuries ago.