Year Number 1996 3.72340416908264 1998 3.72340416908264 2000 1.05820107460022 2002 2.64550256729126 2003 5.52763795852661 2004 7.76699018478394 2005 10.6796112060547 2006 12.5603866577148 2007 9.17874431610107 2008 9.13461494445801 2009 5.21327018737793 2010 4.26540279388428 2011 5.68720388412476 2012 9.00473976135254 2013 7.5829381942749 2014 8.09523773193359 2015 8.5714282989502 2016 10.9523811340332 2017 8.5714282989502 2018 7.07547187805176 2019 5.66037750244141 2020 4.24528312683105 2021 1.41509437561035 2022 0