Year annual % 1961 2.9373798976467356 1962 4.02026566033129 1963 2.761901868389444 1964 4.39853288624235 1965 5.9931394691191 1966 6.547980755773139 1967 5.010240108637461 1968 2.3915183513355913 1969 3.4182107880101853 1970 5.173107485754684 1971 7.110288233748705 1972 6.973165089820512 1973 7.033770521436907 1974 9.458146907318323 1975 14.512401859778265 1976 11.91896630198886 1977 10.529569306733904 1978 9.549067012658469 1979 7.943208291701225 1980 11.716509872825839 1981 8.767342175897056 1982 8.084605371925747 1983 9.954061935552772 1984 7.635982040425546 1985 6.404506965316202 1986 6.322723109505262 1987 4.720949239903135 1988 6.571206425558131 1989 7.924666829385998 1990 9.473820684139383 1991 8.24678891530533 1992 1.0153412427837338 1993 2.2122710919302904 1994 2.5880423161401183 1995 3.811391398444613 1996 1.0090586064723368 1997 1.5255179578795435 1998 0.8129596913657906 1999 0.8978646156174079 2000 1.5057704824390328 2001 2.483522966054764 2002 1.5476393976802854 2003 1.700239434674316 2004 0.3330218977412045 2005 0.6863830506989643 2006 1.757413690745409 2007 2.825893231362471 2008 3.2352352799719313 2009 2.358905100510327 2010 0.9475654186946088 2011 1.088359400370706 2012 1.0014220230161612 2013 0.9273956914019834 2014 1.7445312915834705 2015 2.1211802450954735 2016 1.5256099139809436 2017 2.135151824512519 2018 2.3969203345050687 2019 2.5468754814561123 2020 1.9940459278596592 2021 2.5858854008417467 2022 6.016234794209581 2023 5.618097882997091