Year annual % 1962 2.322530455505742 1963 3.0858748453326967 1964 3.3468804753410524 1965 3.0021909560261903 1966 3.7370022618910212 1967 2.898494359650094 1968 3.3106244875947084 1969 4.105660630660807 1970 4.722013830008478 1971 5.4644251798667725 1972 6.388138858082321 1973 11.618426854593622 1974 16.714355406778935 1975 10.65637827357098 1976 9.306933534068861 1977 9.69308560738991 1978 7.914918977967773 1979 11.51223771623404 1980 13.053545786589908 1981 10.0773395761492 1982 8.11308950866379 1983 7.7254932590189895 1984 7.923232848227386 1985 5.526820142826509 1986 5.09796961147002 1987 7.1082330926846495 1988 6.513415352208476 1989 7.147738827784437 1990 7.987849574411683 1991 8.671014741171646 1992 7.34406692918725 1993 8.085875532060868 1994 9.808157634572396 1995 8.667818238979422 1996 6.619638067794796 1997 4.640370849500769 1998 4.725408747150837 1999 4.339687601399135 2000 5.4244343271662245 2001 3.846153846153854 2002 3.6474762708811994 2003 3.9335033388896363 2004 5.629328294225203 2005 5.781251842554909 2006 5.510095287497236 2007 5.846892311935221 2008 7.849030377477732 2009 2.332361516034979 2010 4.364999735052294 2011 5.473736785227402 2012 3.593110847443512 2013 2.246122317924197 2014 1.9411989774866782 2015 2.264507272346073 2016 1.9398077467298265 2017 2.8940419140037363 2018 2.756312669935099 2019 2.395694666010037 2020 1.882275204082866 2021 4.643698667901262 2022 7.3324342493489425 2023 5.137467424690826