In May 2011, the global ratio of spam in email traffic from new and previously unknown bad sources increased by 2.9 percentage points since April 2011 to 75.8% (1 in 1.32 emails) In May, phishing activity was 1 in 286.7 emails (0349 percent) in May, a decrease of 0.349% since April. The UK had the highest ratio of malicious emails in May as one in 91.7% of emails was blocked as malicious in May. The most frequently blocked malware targeting endpoint devices for the last month was the W32 worm.”]
Source: https://www.csoonline.com/article/2134718/extras-from-symantec-spam-report.html