Year annual % 1971 7.845870991838751 1972 8.518077713469225 1973 11.849433856078079 1974 15.945201298200914 1975 16.78179540749845 1976 16.489857215661544 1977 23.383092556526464 1978 20.631041405103417 1979 16.93168907281617 1980 13.354813841548065 1981 12.351173215106087 1982 13.582349832027603 1983 11.8842352506624 1984 10.864734374836615 1985 8.595463759908114 1986 10.878815258643698 1987 5.944198809856189 1988 5.936124988875747 1989 6.896207141217545 1990 7.326243658341355 1991 6.935148361608839 1992 6.710768960511416 1993 4.537232146758583 1994 3.879858321586312 1995 4.933121049365525 1996 0.7971777293212625 1997 2.2281603066612234 1998 1.499553843312711 1999 2.731979525351022 2000 28.74155289759915 2001 3.0805351791655937 2002 3.2395317698777717 2003 3.1774842155647605 2004 3.0424239980269476 2005 3.3961021299505205 2006 3.457184086703961 2007 3.2112273413143555 2008 2.274338319843224 2009 0.1321361324054635 2010 0.37431375811011947 2011 0.1967641520310508 2012 0.17455690577948246 2013 0.44849220019473535 2014 -0.08401931655707529 2015 0.6605889591378684 2016 0.3477953815757928 2017 1.1365093431963942 2018 1.0124784800529767 2019 1.3747535082918887 2020 1.1137860741040129 2021 2.5595565255635933 2022 4.235990228782029 2023 5.859905503036671