Year annual % 1961 1.3605459596234406 1962 1.2708673550504626 1963 1.2928125371587176 1964 1.3042499847241156 1965 1.3339274618202164 1966 1.3727333351409534 1967 1.4030184226953675 1968 1.4196358689973387 1969 1.4212014770562598 1970 1.4141331534893835 1971 1.4007479550435236 1972 1.381599255154552 1973 1.3353348298366126 1974 0.9965726036196687 1975 0.9005406251771143 1976 1.1485828307050048 1977 1.135730767512757 1978 0.8939826695133783 1979 0.6319035154904412 1980 0.731649880376522 1981 0.6079927428042013 1982 0.40685269080893677 1983 0.6026059935701813 1984 0.8272240326348747 1985 1.0585288439851177 1986 1.222583265159752 1987 1.3728374052894132 1988 1.5195445389965998 1989 1.751430834156108 1990 1.8586873428340103 1991 1.4285035417946952 1992 1.0066845337152968 1993 1.0357706949882295 1994 1.0641762044853602 1995 1.0578555537662677 1996 1.020737764219983 1997 0.9972985416183685 1998 0.9692528383740819 1999 0.8477937383895635 2000 0.8773515770096434 2001 1.1818753422905848 2002 1.3672659997248438 2003 1.374120969359477 2004 1.5650269917372714 2005 1.9891207773170347 2006 2.120491942292663 2007 2.0067472611143695 2008 1.836069843550941 2009 1.6621827138673777 2010 1.6571275287469558 2011 1.7436125905322108 2012 1.7085730730937931 2013 1.5856290804629505 2014 1.485637945961784 2015 1.2505252105961209 2016 1.030988234714994 2017 0.9960358230790592 2018 0.9599603892939768 2019 0.929798498145076 2020 0.9742240610440217 2021 1.050866834546718 2022 0.9727885562842061 2023 0.8646623165414508