Year % (cumulative) 2003 26.7887992858887 2005 27.3732299804688 2006 27.6708507537842 2007 27.9248294830322 2008 28.3521308898926 2009 28.6239604949951 2010 29.0145206451416 2011 29.2891807556152 2012 29.5943202972412 2013 30.0454902648926 2014 30.3143901824951 2015 30.4090805053711 2016 33.4865036010742 2017 31.016170501709 2018 35.0682411193848 2019 31.9761295318604 2020 37.1247138977051 2021 32.8852920532227 2022 33.5436515808105