Year annual % 1961 0.6936169186198873 1962 0.6884714005925613 1963 0.719407567673838 1964 0.7420179573769473 1965 0.7251292017385442 1966 0.7782616033233986 1967 0.8227100899496328 1968 0.5944823742281027 1969 0.4205101939839996 1970 0.4258706200447075 1971 0.5121209019569819 1972 0.5964954572905112 1973 0.5693503042395367 1974 0.18552697730148632 1975 -0.25002385295294655 1976 -0.16137385266896145 1977 0.05370567237516436 1978 -0.06568014572503363 1979 -0.15515046266525157 1980 0.01539624051159025 1981 0.2137222073791202 1982 -0.3330037152060165 1983 -0.567951937555925 1984 -0.4174040102033355 1985 -0.36429404481182 1986 -0.3540935439460337 1987 -0.3560971252417756 1988 -0.2811678208092329 1989 0.025989651615105476 1990 0.332494357748522 1991 0.5670723419927385 1992 0.6657056244729832 1993 0.38630338903200145 1994 -0.05702969516226623 1995 -0.2907436217549189 1996 -0.3140662279665296 1997 -0.33614684340576906 1998 -0.3450783979079569 1999 -0.262302086402193 2000 -0.22017599153974882 2001 -0.08162527651257435 2002 0.02536986759978752 2003 0.016674641082764695 2004 0.14603311994825452 2005 0.20460952456336462 2006 0.015869680203451232 2007 -0.1605279340785902 2008 -0.17399096902381808 2009 -0.22745214223755422 2010 -0.2531731457674031 2011 -0.15892184185428393 2012 0.511947895650249 2013 0.9195601994458508 2014 1.1123852325778198 2015 1.4490014803775664 2016 1.4100617997364724 2017 1.0204786258452712 2018 0.8359055151181553 2019 0.8179106073355795 2020 0.8125731609667031 2021 0.8552268345832902 2022 1.3977264777841314 2023 1.457622084419761