What is the ideal keyword density of a page?

What is the ideal keyword density: 0.7%, 7%, or 77%? Or is it some other number? Matt Cutts, Bay Area, California Have a question? Ask it in our Webmaster Help Forum: www.google.com Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions: twitter.com More videos: www.youtube.com Webmaster Central Blog: googlewebmastercentral.blogspot.com Webmaster Central: www.google.com