Since then, the number of attempts to divert supplies from trade among European Union-based trading companies have decreased considerably, although they have not ceased altogether, as was evidenced by a seizure of 2.2 tons of the substance in Austria in April 2015. New control measures have also led traffickers to revert to other forms of crime to secure supplies. For example, in 2015, the Netherlands reported that 18,000 litres of acetic anhydride had been stolen during transportation between two companies in that country. In 2014 and 2015, Belgium, Germany, the Netherlands and Spain reported seizures of large amounts of diverse “designer” precursors, derivatives of internationally controlled precursors included in Table I of the 1988 Convention.