<p>The Digest of UK Energy Statistics (DUKES), which the Department publishes each year, sets out the amount of UK biomass used to generate electricity (table 6.6) and in combined heat and power plants each year (table 7.2). Current data covers the calendar year 2012. The data for 2013 will be published in July 2014.</p><p>Ofgem also publishes each year the data provided to it under sustainability reporting requirements for the renewables obligation (RO). Recent changes to the RO require information to be provided on the country of origin. The raw data for the year 2012-13 is expected to be published by 31 March 2014.</p>