Year % 1996 0 1997 0 1998 0 1999 5.365474 2000 3.861928 2001 5.402208 2002 2.401801 2003 5.992635 2007 3.232415 2010 3.786496 2011 0.4699038 2012 1.137419 2015 0.8665042 2016 6.724387 2021 0.5421184