Year annual % change 1996 36.2999992371 1997 -25 1998 -52.6497001648 1999 102.1999969482 2000 -9.8035507202 2001 -19.4764404297 2002 -14.5100002289 2003 77.6699981689 2004 -2.1099998951 2005 13.3111771908 2006 80.7193578265 2007 66.60972067993511 2008 -52.7044347603 2009 66.2637916011 2010 6.914682734036148 2011 -21.6726736051879 2012 17.1711747606138 2013 7.26434807444456 2014 3.02638337253336 2015 -6.00718204917274 2016 -2.02499777737666 2017 46.0300246028568 2018 -20.5154802260354 2019 19.2613536982916 2020 27.8722333876836 2021 -20.6476211849016 2022 -23.624843569482