More than 10% created have been stolen so far.
The six biggest hacking, theft and fraud incidents involving Bitcoin exchanges, wallets, or investment vehicles have resulted in a total 1.2 million Bitcoins being stolen, out of a total of 11 million Bitcoins in existence. This means that more than 10 percent of all Bitcoin has been stolen, and this does not include many smaller thefts and losses from individual wallets. Just this week, another wallet service was shut down after suffering an attack
http://techcrunch.com/2013/04/05/why...about-bitcoin/
But don't worry. Even though nations can't keep their deepest secrets secure, your money is safe.