The worst performer is Moscow which has only 21 highly cited papers compared to an expected value of 78.7.
I thought you might be interested in the following story on TechnologyReview.com:
"Mashups Reveal World's Top Scientific Cities"
Combining citation data with Google Maps reveals the cities where science prospers, and those where it doesn't
http://www.technologyreview.com/blog/arx
To view this story, click the link above or paste it into your browser.