Year annual % 1971 3.413529528745812 1972 6.823368967748095 1973 15.997451187275885 1974 14.782679128145418 1975 8.378411575717507 1976 8.140499411624063 1977 7.166047889171907 1978 5.8400546288550075 1979 11.027403382076585 1980 12.668465525167917 1981 7.256554284055511 1982 7.440847560335058 1983 6.883437943757613 1984 4.879819274434858 1985 3.6601992108485035 1986 2.9716170842458425 1987 7.581920302133973 1988 8.496710422241982 1989 6.626881386018191 1990 7.842954435974711 1991 7.245674420120167 1992 7.447504533978716 1993 6.490654767121896 1994 7.70059550868136 1995 5.740236145627222 1996 6.506730635427772 1997 5.951275420371729 1998 7.447953426752491 1999 6.1214526604288295 2000 2.998888195402401 2001 3.366848647963934 2002 4.698928162019669 2003 5.4874291358028415 2004 4.823737964616342 2005 6.076678823420863 2006 5.104213273029103 2007 6.518033507327118 2008 7.795346036981911 2009 1.8267036840065742 2010 4.37088435978275 2011 5.41240809007968 2012 3.576513520938107 2013 2.346290098746053 2014 3.0530553080051277 2015 2.348496006859179 2016 2.438924086882068 2017 3.3410421584153767 2018 3.6266473002725945 2019 1.499486194790947 2020 0.8908252443129925 2021 3.713448366875525 2022 5.638377288097615 2023 4.400000614890814