Note: This calendar view maps the number of captures of http://www.unesco.org/new/zh/tip-a-friend/?tipUrl=http%3A%2F%2Fwww.unesco.org%2Fnew%2Fzh%2Funesco%2Fabout-us%2Fwhere-we-are%2Fvisit-us%2F, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.