Over the past year, 4,149 data breaches compromised more than 4.2 billion records, shattering the previous all-time high of about 1 billion exposed records in 2013. Businesses accounted for 51% of reported breaches, surpassing unknown (23.4%), government (11.7%), medical (9.2%), and education (4.7%) industries. The top ten breaches of 2016, which included nine hacks and one web breach, led to the exposure of a combined three billion records.”]
Source: https://www.darkreading.com/attacks-breaches/data-breaches-exposed-4-2-billion-records-in-2016