Spam volume dropped from more than 379 billion messages daily to about 124 billion messages daily between August 2010 and November 2011—levels not seen since 2007 —as law enforcement and security agencies shut down major spam-sending botnets, according to Cisco. In September 2011, India was generating the highest percentage of spam volume (13.9%). Vietnam was second with 8% and the Russian Federation was third with 7.8%. Source: Cisco Connected World Technology Report