57% of reported incidents were caused by insiders, with over 1,000 incidents reported in the first three months of 2021. Misdirected email was the second-biggest named cause, with 200 incidents caused by employees falling for malicious emails. Healthcare was the hardest hit, with 420 reported incidents in just three months. Financial services was the industry targeted with the most phishing attacks in the fourth quarter of 2021, with 400 reported incidents reported by the ICO in the same period of the year.
Source: https://www.helpnetsecurity.com/2021/07/16/reported-incidents-caused-by-insiders/