Year annual % 1985 5.322116094733559 1986 2.1715366593673195 1987 5.370775918461291 1988 4.43718611550608 1989 7.478872727025831 1990 9.049359754976408 1991 6.890452429417991 1992 3.742455501651193 1993 2.1563668625874186 1994 2.5413876033717315 1995 2.920032065662511 1996 2.569716752501776 1997 2.6442286108928386 1998 2.387114770020446 1999 2.293968394917286 2000 3.3046764245144686 2001 3.941794103504421 2002 2.4830853281865473 2003 3.1668231489806686 2004 5.448867016663598 2005 2.896698914228253 2006 3.5612616368807295 2007 11.623096080963194 2008 37.7329037032917 2009 6.965883005765932 2010 5.2067878427983345 2011 4.854759529548531 2012 -3.683684216551214 2013 1.535662175359235 2014 -0.5220563976103421 2015 -0.6270420470723508 2016 2.2367860662342025 2017 3.999997097596264 2018 1.2999871863515153 2019 1.8000034248340882 2020 -0.20580242620873435 2021 6.514916897803701