Year % 1996 33.92276 1997 35.78308 2000 12.6851 2001 12.16242 2002 19.16678 2008 38.28442 2009 37.90569 2010 5.816906 2011 21.59688 2012 6.057893 2013 22.49755 2014 8.498762 2015 5.706365 2016 4.291632 2017 3.49827 2018 0.3119386 2019 0.4551719 2020 0.3306764 2021 0.9788733