Year annual % 1961 3.278445997779599 1962 2.4859555087184972 1963 2.7814791463603115 1964 3.3810605811513383 1965 2.405026088434184 1966 4.13875252313607 1967 1.2277518339989086 1968 1.6279493390750375 1969 4.213958542558437 1970 3.3506517613349587 1971 4.189196487686466 1972 5.145810772725753 1973 7.6185979429071295 1974 13.42263912885685 1975 8.586772089185146 1976 11.31976432848743 1977 10.87198798294493 1978 6.616494662824735 1979 10.76178867457159 1980 11.001281185623917 1981 10.010020939859494 1982 13.820559046017095 1983 9.927936398523407 1984 11.315050030615986 1985 5.297213505550857 1986 0.32606411194819174 1987 2.356511639789673 1988 3.692770551723875 1989 3.5001187582242608 1990 4.822443156260789 1991 3.3128057535960806 1992 0.48293822201271297 1993 2.806707989671459 1994 24.7941952455715 1995 7.396920688998527 1996 6.186424120109415 1997 2.960138770188081 1998 5.309483069109014 1999 4.501097304058099 2000 4.815430261735003 2001 3.8617951943565885 2002 2.6733973874015717 2003 1.7188216320288419 2004 5.68195133906449 2005 6.688933946289573 2006 4.643322139797945 2007 5.477028977357072 2008 9.116999675010078 2009 1.489404270144746 2010 5.429673198937991 2011 8.516660472745727 2012 4.730094835773187 2013 1.5540180473317093 2014 0.7318533296185876 2015 1.9115594158738034 2016 1.7363231292840027 2017 1.759105775700597 2018 2.1503389329898184 2019 1.7390136334711386 2020 1.715558462210275 2021 4.642203346479228 2022 8.094694018904256 2023 3.386691137528622