...several breaches in the year – the median number of breaches is 6 and the mean is 100; * The average cost of the worstincident of the year is highly dependent on the size of the business, varying from roughly £15,000 for small businesses...
http://www.continuitycentral.com/news03875.htm
...87 percent) than small businesses and their breaches tend to be more expensive (£90,000 on average for the worstincident). * Over a quarter of those with transactional websites do not encrypt the transactions that pass over the Internet...
http://www.continuitycentral.com/news02514.htm