Year annual % change 1996 16.3999996185 1997 -73.6289978027 1998 -28.0748996735 1999 95.0999984741 2000 -61.0417098999 2001 -18.5326080322 2002 33.2900009155 2003 69.7200012207 2004 39.3400001526 2005 9.0793650794 2006 67.9278230501 2007 49.26632004621606 2008 -61.072838455 2009 130.0666750379 2010 37.894215406157294 2011 1.13587231711458 2012 2.81133204691368 2013 -24.2073339294329 2014 20.4795636610484 2015 -23.0915672276102 2016 16.3771094315401 2017 16.6381745468843 2018 -9.54201931946006 2019 7.09567020330456 2020 -9.67332488844322 2021 -1.78460528502494 2022 -7.46641633459273