Year annual % change 1997 7.173999786376953 1998 -21.262699127197266 1999 1.899999976158142 2000 45.5856018066 2001 4.3412585258 2002 40.0400009155 2003 -3.4300000668 2004 107.4000015259 2005 -14.0506450072 2006 -1.5475952238 2007 0.3229667773336059 2008 -38.1900045025 2009 -15.8318664926 2010 22.36149231420299 2011 28.4287922086894 2012 -18.5000327781226 2013 -18.9328365405802 2014 -4.3893540425805 2015 74.8622195953126 2016 22.8059960876318 2017 59.9529943111575 2018 29.2201524720223 2019 26.8413533557719 2020 -29.4962819644399 2021 -1.73315098619894 2022 -14.4640281125137