Year annual % 1963 10.68840579710145 1964 2.618657937806874 1965 2.2328548644338118 1966 3.2761310452418098 1967 0.4531722054380665 1968 14.210526315789473 1969 14.654377880184333 1970 7.533302710151585 1971 6.023067065356686 1972 6.69822723609992 1973 36.75068441423582 1974 21.03410189148143 1975 38.721268465179946 1976 29.726173834388618 1977 12.7440415821501 1978 19.514800550979675 1979 8.766317770198754 1980 15.085852687922674 1981 19.726408357608733 1982 12.026806453665507 1983 12.160439344977803 1984 15.873293446541464 1985 0.6016147983657982 1986 22.361294014150534 1987 11.662279388197959 1988 16.611926463045656 1989 3.7443465921509684 1990 -0.49733860318641576 1991 4.466692161708055 1992 3.956470221390708 1993 7.969503438032037 1994 29.38922284778938 1995 22.256566124154205 1996 5.174868257400961 1997 17.729236875070757 1998 1.0446109139927087 1999 2.556132531138574 2000 7.50513534761595 2001 -3.1149270373436293 2002 -3.018593406327703 2003 69.077923468095 2004 -4.341466772176463 2005 -2.4561972341463623 2006 10.3118162970408 2007 7.959399473274973 2008 26.966204293432405 2009 23.45350660097279 2010 17.956650719213442 2011 14.385082974499314 2012 15.559898319977988 2013 10.853154429694042 2014 11.017740310259065 2015 19.415403959833395 2016 11.666094571973423 2017 21.07756290875363 2018 10.441875303670793 2019 9.094124827139241 2020 17.818802982336138 2021 16.862321657474762 2022 2.3593817290421772 2023 -2.88383144359408