Year annual % 1971 4.212676470023055 1972 4.63661787710798 1973 2.004794019472129 1974 -1.0206586797448125 1975 -2.880684788716252 1976 1.6456245783589765 1977 3.37992330959149 1978 2.2108599062146084 1979 1.0710782082646233 1980 2.2205074603661217 1981 0.4121850946627603 1982 -0.3319425903115558 1983 0.8251929799128561 1984 1.2553612688728464 1985 1.6858447371922693 1986 2.2679284380777744 1987 2.348613985531472 1988 1.386577958487294 1989 1.7021210291007662 1990 0.5393810909609016 1991 0.555816433755794 1992 -0.6326124216020332 1993 -1.274739676265881 1994 0.41576873935898107 1995 0.21072210471089647 1996 1.0439529763911253 1997 1.795579646466237 1998 2.0357902710644566 1999 1.6562880509384712 2000 1.677854689597197 2001 1.7272563227119804 2002 -0.3699824599921726 2003 -0.27243699020228007 2004 1.1649788797047478 2005 0.6720637315187332 2006 0.8872241782008672 2007 1.2200675577853133 2008 0.23116606445346122 2009 0.2915002883581792 2010 0.8178268391370977 2011 0.2906732694743681 2012 1.121051443390371 2013 1.0902959308875353 2014 -0.23367289424470528 2015 1.3006239271590232 2016 0.5305417685615765 2017 0.21350763121890282 2018 -0.07633705534047408 2019 0.49410824540537135 2020 -4.069555584638152 2021 1.0289742351824884 2022 3.3215085351647815 2023 1.236285672067197