How often to tech disasters occur?

Companies experience an average of 501 hours of network downtime every year, and the overall downtime costs an average of 3.6% of annual revenue. (Source: The Costs of Enterprise Downtime, Infonetics Research)
93% of companies that lost their data center for 10 days or more due to a disaster filed for bankruptcy within one year of the disaster, and 50% filed for bankruptcy immediately. (Source: National Archives & Records Administration in Washington.)
20% of small to medium businesses will suffer a major disaster causing loss of critical data every 5 years. (Source: Richmond House Group)
This year, 40% of small to medium businesses that manage their own network and use the Internet for more than e-mail will have their network accessed by a hacker, and more than 50% won’t even know they were attacked. (Source: Gartner Group)
Of those companies participating in the Contingency Planning & Management Cost of Downtime Survey: 46% said each hour of downtime would cost their companies up to $50,000, 28% said each hour would cost between $51,000 and $250,000, 18% said each hour would cost between $251,000 and $1 million, and 8% said it would cost their companies more than $1million per hour. (Source: Cost of Downtime Survey Results, 2001.)
Cyber-criminals stole an average of $900 from each of 3 million Americans in the past year, and that doesn't include the hundreds of thousands of PCs rendered useless by spyware. (Source: Gartner Group)