Year annual % 1965 10.88506711409396 1966 9.305844524304899 1967 29.884062986675897 1968 35.3583799626965 1969 14.37992125984252 1970 12.511832028224765 1971 6.5009560229445515 1972 30.262118491921004 1973 12.255361376040575 1974 26.559277084765743 1975 30.95847885137757 1976 29.20469361147327 1977 19.142739198238694 1978 29.851205944062677 1979 18.12953052965505 1980 17.38006500269799 1981 16.69357166529469 1982 26.326108067500964 1983 20.332148814272248 1984 17.351711003700444 1985 14.9668493249177 1986 1.4098097024926295 1987 13.60256545794129 1988 13.598117070447003 1989 5.1821889986858505 1990 11.415655515062616 1991 20.802798522678287 1992 31.274879745385718 1993 7.296641050883817 1994 15.70483906584067 1995 9.463581919967808 1996 14.644645524027059 1997 18.259475390509873 1998 19.572620262855683 1999 13.94717359913829 2000 14.131502836251041 2001 54.05140869190737 2002 18.0521153645852 2003 16.306155680321595 2004 10.451223498341768 2005 11.693603535313478 2006 19.644776629345387 2007 23.090739222131997 2008 16.037082289872206 2009 4.840835097040692 2010 13.548431730127142 2011 19.907003255216104 2012 10.936917085908354 2013 8.40999983699717 2014 14.423673870304315 2015 0.29713102759029403 2016 0.8157745024443127 2017 8.380854997496673 2018 11.102259201215327 2019 -0.7575311125202779 2020 7.44561734572452 2021 13.183758653267075 2022 14.32625275943265 2023 5.991936822235234