...”Time, down 34.9 percent to about 90,000...” in late 2009.
I suspect that their influence is a bit disproportionate though, because they are widely used as a source, even if no one reads the actual mag.
(However, these numbers come from the NYT, so, who knows how accurate they are?)
http://mediadecoder.blogs.nytimes.com/2010/02/08/magazines-newsstand-sales-fall-91-percent/