Year % (cumulative) 2004 18.9424591064453 2005 19.8808097839355 2006 24.2775096893311 2007 21.2649593353271 2008 23.9603500366211 2009 24.8702507019043 2010 25.2488899230957 2011 25.9194793701172 2012 27.2100105285645 2013 29.2403507232666 2014 28.7276401519775 2015 29.773509979248 2016 31.3902797698975 2017 31.7605743408203 2018 33.0747489929199 2019 33.9761009216309 2020 35.8461418151855 2021 34.5072402954102 2022 35.2121810913086