All were chopped up (under SALT 1 Treaty, I think)and left in 4-5 pieces, so the Russkies could verify their destruction via satellite.
https://s-media-cache-ak0.pinimg.com/236x/0a/eb/36/0aeb369a683640b30ed83ff1eed4e545.jpg
Current inventory at the boneyard at Davis-Monthan:
http://www.amarcexperience.com/ui/index.php?option=com_content&view=article&id=118&Itemid=238
You have to look under the 28 sections, but we have more than 100 B-52s there.