While this statistic seems high, there's a definite increased trend for keyloggers, password stealers, backdoors, phishing attacks, etc.  Malware writers are more inclined to steal from folks in a stealth-like manner, than to launch the destructive payloads we used to see in the past.

Panda Labs - 88% of New malware in 2nd quarter related to Cybercrime
http://www.pandasoftware.com/about/press/viewNews.htm?noticia=7719

QUOTE: According to Luis Corrons, director of PandaLabs: “the results show how malware creators are concentrating on profiting from their efforts, creating increasing numbers of Trojans and bots. The greatest danger lies in the fact that they are installed and operate silently without users noticing any of the typical symptoms of infection and therefore victims are unaware that their computers are being used to steal from them or even from third-parties. This false sense of security works in favor of the attackers.”