Wikipedia has numbers: Every year, about 5,500 duds are removed (sometimes, evacuation of several 10,000 people included), the daily average is given as 15. In

Wikipedia has numbers: Every year, about 5,500 duds are removed (sometimes, evacuation of several 10,000 people included), the daily average is given as 15. In 2013 an estimated 100,000 were remaining. Wars suck, for everyone and for a long time. (https://en.wikipedia.org/wiki/Unexploded_ordnance https://en.wikipedia.org/wiki/Unexploded_ordnance + the german article)