Year annual % 1961 2.7821588820763594 1962 3.9739449888865437 1963 3.1624704179471337 1964 4.611031222567362 1965 4.19704019609371 1966 4.4421888998453625 1967 3.241890281561723 1968 4.196662443877003 1969 4.208987949947769 1970 5.4247392538376005 1971 6.657331404479194 1972 6.889071837057102 1973 9.076527419512239 1974 12.531996857284732 1975 13.237913854492334 1976 10.749208780418769 1977 8.875873973288535 1978 8.954735347550113 1979 7.943208291701225 1980 11.68693736880897 1981 9.73064989177783 1982 9.598165860672268 1983 7.102264215483146 1984 6.35544799952519 1985 5.2014592601119745 1986 3.9464651642693553 1987 3.4566593025448284 1988 3.220002507911495 1989 5.243525524138896 1990 4.2960229384631745 1991 8.24678891530533 1992 6.710771178083121 1993 5.972764457863406 1994 5.270982342760149 1995 8.821120813441624 1996 3.783557832514191 1997 3.8852076349037645 1998 3.351437030211372 1999 2.5411101326916707 2000 3.3297547087570507 2001 3.6603047451352353 2002 3.274341880430228 2003 2.1894102270240836 2004 2.709268187902495 2005 2.543104992631669 2006 2.899074015474241 2007 2.9663454927419792 2008 3.2352352799719313 2009 1.6788389598229685 2010 0.9299604239289039 2011 1.616249000113811 2012 1.6787792155143535 2013 1.2799870542613405 2014 0.982645554501687 2015 1.138248785332351 2016 0.8741154263263411 2017 1.4640640238877012 2018 2.0074924413161312 2019 2.294850819780521 2020 1.9285720163688467 2021 2.6858024315831415 2022 6.482697502687415 2023 6.628008068941284