Year annual % 1961 0.332205945818093 1962 0.398054786807546 1963 0.747606930682632 1964 0.94647753571233 1965 0.908137001686598 1966 0.675463567135343 1967 0.556645554862671 1968 0.393391107738732 1969 0.283169669202288 1970 0.0986136915027669 1971 0.182247071467749 1972 0.391585907459382 1973 0.314658765693604 1974 0.314633664597999 1975 0.288978161128393 1976 0.178674447005659 1977 0.123479645392964 1978 0.0932999598130252 1979 0.0898825512632337 1980 0.110211165985901 1981 -0.0026371543402261 1982 -0.027176883483947 1983 -0.00794447069062125 1984 -0.00150170778678296 1985 0.029786422643661 1986 0.0356488507832359 1987 0.0852521408125053 1988 0.317926245358661 1989 0.363247985870165 1990 0.298235706313592 1991 0.371593165668169 1992 0.405713495856337 1993 0.390638517826929 1994 0.308197073686726 1995 0.209436838020324 1996 0.1953931762382 1997 0.241991884983082 1998 0.213527650670943 1999 0.229189103029716 2000 0.242517956221334 2001 0.343951157623668 2002 0.448268894821562 2003 0.418641508069053 2004 0.432788248129175 2005 0.550055708089009 2006 0.659558214980699 2007 0.734330830765919 2008 0.789976845480149 2009 0.804599572619861 2010 0.913639391631709 2011 1.3010029017038 2012 0.620163579337378 2013 0.471340143966627 2014 0.44392928847521 2015 0.579446241677791 2016 0.506300002451376 2017 0.385228018372369 2018 0.455184695275022 2019 0.540461327098122 2020 0.430996815099722 2021 0.411601996532257 2022 0.856132433382837 2023 1.16366497533437