Year % (cumulative) 2007 22.8041095733643 2008 22.9191398620605 2009 22.9491806030273 2010 23.4601593017578 2011 23.5408992767334 2012 23.577320098877 2013 23.5886306762695 2014 23.5936508178711 2015 23.5745391845703 2016 23.6127796173096 2017 23.518669128418 2018 23.4772300720215 2019 23.3982200622559 2021 24.9332447052002 2022 27.3954010009766 2023 27.1026706695557