According to the ITRC, there have been 5,754 data breaches between 2005 and November 2015 that have exposed 856,548,312 records. According to their data, there were 783 breaches in 2014, the largest number of data breaches in a single year to date. 29% of breaches involved hacking incidents in 2014 compared to just 14.1% in 2007. Below is a list of 8 of the worst breaches in history that highlights the cause of the breach and the effects on the public and business sectors.”]
Source: https://informationsecuritybuzz.com/articles/8-of-the-largest-data-breaches-of-all-time/