Year annual % 1971 -2.4636611835049678 1972 -0.334220344247953 1973 0.367729283328714 1974 -3.258278649073361 1975 -2.6675011706147984 1976 0.1597083732078204 1977 -13.910181700746662 1978 1.5140256064893833 1979 -1.5393524100084903 1980 -7.110627882304627 1981 -5.065415873246366 1982 -12.153556380731416 1983 -7.127047365126572 1984 -0.6878338736314902 1985 -6.8358812852297035 1986 0.8008661677496178 1987 -3.747187351966218 1988 2.114016751152434 1989 2.5510535006414443 1990 -0.04591565134745679 1991 -4.852868550129173 1992 7.832764878710179 1993 -4.319239203723043 1994 -1.547185617789637 1995 -0.4731655846616718 1996 1.5870040089503163 1997 24.97629316345669 1998 5.39811577215805 1999 -1.2089826252517355 2000 2.5701661538459035 2001 -1.136390356198632 2002 2.0190626389639164 2003 -1.176817810102122 2004 14.710638960329774 2005 -1.4701853255203616 2006 5.493221290212432 2007 -2.7817182111792818 2008 0.36088052236753754 2009 0.415386597297541 2010 12.387494904147033 2011 7.67760832016431 2012 -0.8475540243832427 2013 -1.1771920466434267 2014 -3.1783657022724583 2015 -3.928099196191013 2016 -4.107862467890797 2017 -5.732609621736842 2018 -0.7767391753548054 2019 -0.7644966407222427 2020 -1.9207575885120605 2021 4.354427079829364 2022 3.942580335771325