Year annual % 1961 2.15581780692653 1962 2.15958854974531 1963 2.07775943717425 1964 2.04728270159526 1965 2.02936874632333 1966 1.80722626074163 1967 1.79748465360588 1968 2.12174377391662 1969 0.610455920926868 1970 -1.27968496827538 1971 0.236387235223208 1972 1.97358731312873 1973 2.31485658965149 1974 2.2316200879638 1975 1.85520839947677 1976 1.78670018284243 1977 1.58460084500781 1978 1.51661215416292 1979 1.3944163667003 1980 1.22076316298951 1981 1.16437438642673 1982 0.958532684599375 1983 0.772098771309537 1984 0.558216975180665 1985 0.65408357333707 1986 0.667699821035644 1987 0.209695126697668 1988 0.466885394224667 1989 1.15118704321262 1990 1.43248340439587 1991 1.40372762749041 1992 1.47674420798055 1993 1.55455421737784 1994 1.45334687174069 1995 1.42047268115728 1996 1.39265234387862 1997 1.42041694849881 1998 1.55450574715668 1999 1.55343670777437 2000 1.57442145947664 2001 1.8908203925672 2002 2.29288216357038 2003 2.23449282668431 2004 1.70559131630084 2005 1.41638176095381 2006 1.51683672327943 2007 1.36913510961371 2008 1.07415232421642 2009 1.16259668589342 2010 1.75216316570038 2011 2.76759782372225 2012 1.94133513897054 2013 0.460726231664924 2014 0.31196593678607 2015 0.540630657141614 2016 0.783340306115649 2017 0.654001447275102 2018 0.293203751950861 2019 0.0643896179357351 2020 -0.501577644647767 2021 -0.773412758286969 2022 -0.252206943270995 2023 -0.053490239306932