The first-ever Orange Business Index, which looks at the previous year's trends in business mobile communications, shows that average data use across all Orange UK business customers increased by over 150% during 2009. The highest increase was among small business, which saw a 290% increase in data consumption to a monthly average of 16.3MB per user. Medium-sized businesses experienced a 226% increase; a monthly average of 10.9MB per user. Much of this increase in mobile data usage has been driven by the rise in popularity of mobile email and web browsing.