From Risk Based Security:
We are pleased to release our Data Breach Quick view report that shows 2013 broke the previous all-time record for the number of exposed records caused by reported data breach incidents. The 2,164 incidents reported during 2013 exposed over 822 million records, nearly doubling the previous highest year on record (2011).
Although overshadowed by the number of exposed records, 2013 is also ranked #2 in total reported data breach incidents, just behind 2012. “When you analyze the data breach activity in 2013 it’s hard to find any bright-side, said Barry Kouns, CEO of Risk Based Security. “Four of the “Top 10” data breaches all time, were reported in 2013, including the top spot. “
Read more on Risk Based Security. Some of the findings appear to directly contradict those reported by the ITRC in its report. As always, consider the differences in sources and methodologies when interpreting findings of these studies or any other studies.