Year % 1996 45.60185 1999 38.58657 2000 6.695172 2007 37.76599 2009 39.99366 2010 39.99366 2011 38.00378 2012 35.06261 2013 35.06261 2018 35.57349 2019 34.03933 2020 34.03933 2021 31.41756