Year % 1982 7.835629178731186 1983 10.781751312290208 1984 5.358728824957516 1985 4.279088449343812 1986 8.78350941744128 1987 7.847316909199299 1988 5.21164607489031 1989 3.0543097103812187 1990 12.307585114303292 1991 5.279920897261844 1992 7.70259948491638 1993 9.765036457778004 1994 7.594953394116352 1995 7.784522040678654 1996 7.128352361562982 1997 9.28555185844833 1998 9.823877838321598 1999 10.383236997984497 2000 8.49301036776852 2001 7.873717810016708 2002 10.89653084230763 2003 12.134639674579079 2004 7.991377657385961 2005 7.391312725799733 2006 4.98861196232189 2007 7.267924036782511 2008 1.5589163709033298 2009 11.004042657078626 2010 10.047016096752635 2011 10.4380374487312 2012 5.5806454851439105 2013 6.1668456171986366 2014 8.346067681506511 2015 6.037649233302357 2016 5.836425342177342 2017 6.6843122956056 2018 8.599878240676757 2019 4.106838562838003 2020 7.154646579275148 2021 3.6530539143764353 2022 4.736474444544355 2023 3.9445926931128223