I'm cautious about that safety document Em
It contains no references and comes from a site directly opposing wind farms.
A number of those accidents for example are probably industrial accidents in places of the world where there is insufficient health and safety.
You'd need to look at how many happened whilst they were operational and how many occurred in countries with proper industrial safety standards.
You'd also want to compare with othe energy generation industrial accidents.
Having said that there are clearly a number of issues like blade damage and this in particular is very very scary!
http://www.bbc.co.uk/news/uk-16115139