Global Software Piracy Study
"Thirty-five percent of the software installed on personal computers worldwide was pirated in 2004, a one percentage point decrease from 36 percent in 2003. Yet, losses due to piracy increased from $29 billion to $33 billion.
The global software piracy study, which indicates that software piracy continues to be a major challenge worldwide, was conducted by global technology research leader IDC.
In 2004, the world spent more than $59 billion on commercial packaged PC software, up from $51 billion in 2003. But over $90 billion was actually installed, up from $80 billion the year before." Source: Business Software Alliance