Year % 1985 -39.272623106997905 1986 -19.13144010524885 1987 -28.958870756697326 1988 -62.770556817938534 1989 -45.646285602838795 1990 -31.459676705487148 1991 61.185941648796344 1992 46.60393798124891 1993 32.69033995314348 1994 22.621877520512385 1995 19.877127196986883 1996 19.916164724990896 1997 22.02446488038716 1998 25.866275291242985 1999 31.206356550591174 2000 25.56984774709478 2001 24.41195004215903 2002 20.633845860145858 2003 18.87154951264258 2004 17.308705204716034 2005 21.284368194886962 2006 15.11949890962917 2007 21.051167410281725 2008 22.32387459458797 2009 18.594490801955867 2010 12.549473374835493 2011 11.178087863362375 2012 17.820022486340065 2013 16.903308069058994 2014 12.994785090205 2015 13.063822015277545 2016 12.985256781151126 2017 12.712203567167922 2018 11.988677700057307 2019 12.283264456872123 2020 8.888580606910997 2021 0.8142998243493444 2022 7.4745259617179824