Year % of total SPL benefits 2004 3.129408332766 2005 3.64374106102905 2006 4.50743389665885 2007 4.15585061983183 2008 5.2274511743737 2009 5.85054392610972 2010 5.5820661978825 2011 5.22652273094031 2012 6.72311444143727 2013 6.50290093526483 2014 6.48728790292341 2015 5.60527385232666 2016 6.09190829034667 2017 6.70648159959037 2018 6.41242303260746 2019 5.5687957566419