Switzerland submitted its declaration of civilian plutonium stock as of the end of 2011 - INFCIRC/549/Add.4/16. According to the document, as of December 31, 2011 Switzerland had less than 50 kg of separated plutonium, which is described as "held elsewhere." This has not changed since the 2010 Swiss declaration. The amount of plutonium in spent fuel also has not changed in 2011 - Switzerland is estimated to have 13 tonnes at reactor sites and 4 tonnes "held elsewhere". In addition, 1 tonne of the material is in spent fuel sent to reprocessing to other countries. The declaration does not specify whether all or some of this plutonium has been separated.