Year annual % change 1997 -67.65979766845703 1998 -38.47919845581055 1999 -17.5 2000 28.4874286652 2001 -20.6722431183 2002 -4.2399997711 2003 15.3699998856 2004 104.3000030518 2005 -27.7493831512 2006 12.8552262471 2007 126.39144061385494 2008 4.253389345 2009 38.6369413514 2010 37.641505023857235 2011 -42.3084397147464 2012 -14.3200475570802 2013 -1.37650183718355 2014 18.5413545960869 2015 -5.37624941281915 2016 7.38073240978265 2017 22.4545269511421 2018 -18.1806535235364 2019 -18.1846609755978 2020 23.5497517901697 2021 20.5885674651328 2022 -25.1065232184124