Period 31 December 2017 & 2016
Period 31 December 2016 & 2015
Period 31 December 2015, 2014 & 2013
Period 31 December 2014 & 2013
Period 31 December 2013 & 2012
Period 31 December 2012 & 2011
Period 31 December 2011, 2010 & 2009
Period 31 December 2010, 2009 & 2008
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