"Figure 1: Expenditure by UK businesses on performing R&D, 1991 to 2015","" "","" "","" "Notes","" "Unit","£ billion" "","" "","Current prices","Constant prices" "1991","7.8","12.6" "1992","8.2","12.8" "1993","8.7","13.3" "1994","8.8","13.4" "1995","9.1","13.4" "1996","9.3","13.2" "1997","9.6","13.3" "1998","10.1","13.9" "1999","11.3","15.5" "2000","11.5","15.4" "2001","12.2","16.2" "2002","12.5","16.1" "2003","12.5","15.8" "2004","12.7","15.6" "2005","13.7","16.5" "2006","14.1","16.5" "2007","15.7","17.8" "2008","15.8","17.5" "2009","15.5","17.0" "2010","16.0","17.2" "2011","17.5","18.5" "2012","17.4","18.0" "2013","18.6","19.0" "2014","19.8","19.9" "2015","20.9","20.9"