"Countries with 'hunter-killer' drones include America, Britain and Israel."
"'Almost all' IDF [Israeli Defense Force] ground operations now have drone support."
"...Estimates that America will spend about 60% of the total [global sales of drones]."
"Following the United States, Israel ranks second in the development and possession of drones, according to those in the industry. The European leaders, trailing Israel, are roughly matched: Britain, France, Germany and Italy. Russia and Spain are not far behind, and nor, say some experts, is China... In total, more than three dozen countries operate UAVs, including Belarus, Colombia, Sri Lanka and Georgia. Some analysts say Georgian armed forces, equipped with Israeli drones, outperformed Russia in aerial intelligence during their brief war in August 2008. (Russia also buys Israeli drones.)"
"Iran builds drones, one of which was shot down over Iraq by American forces in February... Iran has supplied Hizbullah militants in Lebanon with a small fleet of drones, though their usefulness is limited."
This doesn't exactly answer your question, but it is an interesting article along these lines: http://www.economist.com/node/14299496
A few quotes:
"Countries with 'hunter-killer' drones include America, Britain and Israel."
"'Almost all' IDF [Israeli Defense Force] ground operations now have drone support."
"...Estimates that America will spend about 60% of the total [global sales of drones]."
"Following the United States, Israel ranks second in the development and possession of drones, according to those in the industry. The European leaders, trailing Israel, are roughly matched: Britain, France, Germany and Italy. Russia and Spain are not far behind, and nor, say some experts, is China... In total, more than three dozen countries operate UAVs, including Belarus, Colombia, Sri Lanka and Georgia. Some analysts say Georgian armed forces, equipped with Israeli drones, outperformed Russia in aerial intelligence during their brief war in August 2008. (Russia also buys Israeli drones.)"
"Iran builds drones, one of which was shot down over Iraq by American forces in February... Iran has supplied Hizbullah militants in Lebanon with a small fleet of drones, though their usefulness is limited."