Searched for http://whc.unesco.org/en/soc/?action=list&id_threats=91%2C97%2C95%2C94%2C90%2C99%2C92%2C93%2C98%2C96%2C&mode=chart 
Note: This calendar view maps the number of captures of http://whc.unesco.org/en/soc/?action=list&id_threats=91%2C97%2C95%2C94%2C90%2C99%2C92%2C93%2C98%2C96%2C&mode=chart, not how many times the site was actually updated.
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