Year annual % 1980 12.989290557919844 1981 20.89567682788022 1982 12.051936047108768 1983 15.102698656400621 1984 2.001473232949983 1985 26.27045322017502 1986 19.823890611143092 1987 -6.92684442316574 1988 25.307923378592466 1989 23.61362538666588 1990 10.124792708097209 1991 7.387696291120248 1992 17.251998113488305 1993 10.397007547811048 1994 6.489569187064896 1995 16.62432091717806 1996 5.181362545407726 1997 11.419325400967598 1998 11.950543975283418 1999 6.477379026437941 2000 24.099289524565634 2001 4.966264373705856 2002 5.491847973825997 2003 9.53825866290841 2004 16.415065063190404 2005 6.819637559181698 2006 14.511875273236047 2007 11.185533663159386 2008 0.23270545030143167 2009 4.870867084373449 2010 6.414922833154763 2011 9.662900726147559 2012 11.973760146588312 2013 11.035853306777357 2014 10.69165676580122 2015 4.856791169781376 2016 -0.43905663386009663 2017 -2.4660625619991605 2018 -2.5739616853174847 2019 -15.11758729823923 2020 -8.123249567547646 2021 8.860092007570726 2022 3.739678447664911 2023 -1.8540196878512816