The Chaos Report is the first survey made by the Standish Group. This report is the landmark study of IT project failure. It is cited by everybody writing a paper or making a presentation were a reference is made of IT project failure.
It includes large, medium, and small companies across major industry segments : banking, securities, manufacturing, retail, wholesale, heath care, insurance, services, and local, state, and federal organizations. The total sample size was 365 respondents representing 8,380 applications.
It is also hotly contested and disputed (as brief Google search will verify) – so do not accept this data as utterly without question true.
However, I bet a few of these ring true with most people involved in project work!