Year annual % 1990 9.04935975497641 1991 6.89045242941799 1992 3.74245550165119 1993 2.15636686258742 1994 2.54138760337173 1995 2.92003206566251 1996 2.56971675250178 1997 2.64422861089284 1998 2.38711477002045 1999 2.29396839491729 2000 3.30467642451447 2001 3.94179410350442 2002 2.48308532818655 2003 3.16682314898067 2004 5.4488670166636 2005 2.89669891422825 2006 3.56126163688073 2007 11.6230960809632 2008 37.7329037032917 2009 6.96588300576593 2010 5.20678784279833 2011 4.85475952954853 2012 -3.68368421655121 2013 1.53566217535923 2014 -0.522056397610342 2015 -0.627042047072351 2016 2.2367860662342 2017 3.99999709759626 2018 1.29998718635152 2019 1.80000342483409 2020 -0.205802426208734 2021 6.5149168978037