Year annual % 1962 1.5638173222767051 1963 3.623391922729617 1964 3.169134328878343 1965 3.888692004701788 1966 4.309244984565893 1967 0.6737247062806944 1968 1.8621542647641363 1969 5.100220415516738 1970 3.6900239130671793 1971 3.0018083172566037 1972 4.974395468174194 1973 9.964066763623862 1974 14.160909161626563 1975 12.265417976400613 1976 8.179576770605777 1977 8.757184868388876 1978 8.861030683914485 1979 10.007967619254714 1980 10.326773218356486 1981 9.296501276840068 1982 9.505334049156893 1983 10.817400274057889 1984 10.912606674063468 1985 10.109342374390728 1986 8.018687917568258 1987 11.615020220822956 1988 10.760729804788078 1989 10.575520820101787 1990 11.97921864996463 1991 13.791009602903074 1992 13.938990210066109 1993 11.24027660184489 1994 22.731924150184774 1995 12.76144395605506 1996 11.1899353505517 1997 6.4983785778564 1998 8.36301144111664 1999 7.43186108423555 2000 6.57579335583457 2001 6.994935195805567 2002 5.3920377111091256 2003 8.41868264342142 2004 6.885623130454576 2005 8.584884441446874 2006 7.360039279025443 2007 7.321247317683358 2008 9.213717485620947 2009 2.5220383614607798 2010 6.45159937018169 2011 9.409031247640598 2012 5.85857920523604 2013 4.60163821236538 2014 3.5608847720580457 2015 3.357772959564656 2016 3.6156780953078567 2017 3.9217186200013288 2018 4.355858468041802 2019 4.209105968090981 2020 3.841063385880261 2021 5.1643349248259796 2022 7.3000342387016275 2023 6.834264015310119