Year % 1982 8.130636193361866 1983 11.650914136512949 1984 12.527206815429183 1985 14.399274921608548 1986 13.696435759086953 1987 13.007471099645608 1988 5.676525793982976 1989 3.5167512187592846 1990 -6.366507516774572 1991 -3.4910855806889187 1992 17.370921589218398 1993 10.053068510557186 1994 2.7494909346839456 1995 2.615736404295686 1996 9.770487561864943 1997 13.059542765283902 1998 18.489293672091524 1999 20.986865055382097 2000 17.436909825412986 2001 14.507019172007334 2002 16.702334139104146 2003 14.225065919821716 2004 12.610771394749804 2005 10.768092075995295 2006 11.474282448246903 2007 9.359386038805386 2008 9.412844122221241 2009 10.952957516061304 2010 13.554792887701447 2011 9.971806992330741 2012 14.356962984823213 2013 18.453282416028564 2014 12.880621868392396 2015 12.83497682682533 2016 15.098536558980896 2017 14.109127583791505 2018 15.554078111351432 2019 13.526118509515069 2020 13.159500507325067 2021 10.859926556595646 2022 4.843586540775302 2023 7.741723450449452