Market size for building automation products

A US Govts website has this report. Report is dated 2005 and is based on data till 2001. The website is current indicating that there has been no recent data.

http://www1.eere.energy.gov/buildings/advanced_rd.html

It says that in 2001 US has spent USD 3,100 million on automation products. Making report is a pretty complex job, We do not have such information for Indian Buildings