The event marked the most successful show in 10 years, with over 6,500 companies from 65 countries displaying and sharing their innovative industry concepts. Over 230,000 visitors—an increase of 10-15 percent over the 2009 event—traversed the more than 30 halls, spanning 5.3 million square feet of exhibit space. (For comparison's sake, 2010's attendance numbers are not as relevant as 2009's, as the volcanic ash situation affected attendance last year.) Companies from a variety of industries and sectors, with energy, power plant, digital, vacuum, automation, and micro and nano technologies all represented.