Year annual % change 1998 -33.790000915527344 1999 -18.100000381469727 2000 10.9040594101 2001 -3.5102312565 2002 44.1899986267 2003 12.7899999619 2004 -7.6999998093 2005 7.4176139626 2006 85.1523249599 2007 68.06189019109752 2008 -59.2785984198 2009 31.1147778051 2010 -0.4042871433309836 2011 -30.3401615551312 2012 -5.20249033406598 2013 3.19653004295573 2014 -12.6860519832889 2015 -4.71678581799282 2016 15.5085110869424 2017 6.38562099797713 2018 -9.33378799630591 2019 13.3777545064777 2020 -2.12576089292171 2021 5.00352099410888 2022 -12.7411639342965