Year annual % 1976 22.438935250045684 1977 5.9450370134522 1978 19.621709445054893 1979 17.47087271927896 1980 11.770091896407687 1981 17.459757468487645 1982 9.222898159696593 1983 14.553581416160185 1984 11.495786830788068 1985 19.927307494809764 1986 25.428282791388213 1987 16.286071250955228 1988 22.520690036446176 1989 16.6278157016927 1990 11.755190235641077 1991 7.94519867895738 1992 2.8160184345851795 1993 6.08693400318525 1994 6.500113952590396 1995 10.767235915517665 1996 4.912300051809941 1997 4.194476569339827 1998 11.558508067427335 1999 8.160894958814085 2000 6.147047961559947 2001 4.48039208270123 2002 1.336631091048143 2003 10.711869240548543 2004 7.990599924098619 2005 12.456223125575805 2006 17.43189041260768 2007 6.945119888404985 2008 7.689133609159214 2009 3.0278347690702794 2010 1.8211774029947378 2011 3.2026949934579054 2012 3.2792041614916294 2013 2.990424451703805 2014 2.8314765129081265 2015 5.418200804238104 2016 1.0031891065554042 2017 2.8748706197521434 2018 4.959961256409296 2019 -8.341667134727325 2020 -12.689666872070585 2021 14.864397950217286 2022 4.054887973742267 2023 11.03661408963174