Year annual % 1961 -1.0703777132165015 1962 1.834238671693413 1963 5.284227161044043 1964 2.566646415842527 1965 3.0403238249997884 1966 -2.7799175089021304 1967 -10.181996836168807 1968 -0.2934225164480324 1969 12.752057213833282 1970 14.869437417478466 1971 7.7693468813510975 1972 1.3912499910787375 1973 2.8879404287692267 1974 5.5712391418306595 1975 -4.766307187079406 1976 3.2644973196233877 1977 2.1348752277792897 1978 -3.4290017883531476 1979 2.6993971059526416 1980 1.9720638282400245 1981 -7.522906120725878 1982 -4.318530928001863 1983 -5.796289502186724 1984 -1.1808631019959108 1985 2.973176775152723 1986 -0.1804796658521326 1987 0.7538758642918708 1988 3.2112881216944515 1989 0.10814558384757333 1990 3.439150294118079 1991 -0.8608955857333029 1992 0.43095862664091555 1993 -2.686029549129117 1994 -1.702757562333261 1995 -0.6248781303980451 1996 1.8373332167983278 1997 -0.6547010205566011 1998 0.06444631228323772 1999 -0.4767152742346781 2000 1.0181710977484926 2001 1.561212181042464 2002 4.355130016756718 2003 2.584112194796816 2004 5.057771718731786 2005 3.7565993195235734 2006 3.4138104965497433 2007 3.1376026619030597 2008 1.6814554104755786 2009 3.4228951718534972 2010 3.298275031779397 2011 2.0697259226569003 2012 2.0810275955382167 2013 3.315334217836565 2014 3.473918928971287 2015 1.7209954608812268 2016 0.15523699558706028 2017 0.5695163982229161 2018 1.776310797432501 2019 0.7063172153172417 2020 -3.4441961254779017 2021 2.9793134325893504 2022 2.037505249140054 2023 0.35069730870118576