Year annual % 1971 4.409173776113448 1972 6.823368967748095 1973 11.84466074098576 1974 14.622641110100105 1975 9.460989246830366 1976 8.376200651543357 1977 7.718912826359158 1978 7.309193238011879 1979 10.247665013725552 1980 10.84905808029211 1981 8.477511767240358 1982 7.6842351702110605 1983 7.475060513946509 1984 4.879819274434858 1985 3.685778325313848 1986 3.860159288843711 1987 7.819157355407 1988 7.962118561838963 1989 6.976419856344265 1990 8.503219917634574 1991 7.245674420120167 1992 7.447504533978716 1993 6.490654767121896 1994 7.253088482422342 1995 5.150414709270507 1996 4.590050944928478 1997 5.951275420371729 1998 5.993357487922708 1999 6.1214526604288295 2000 3.408827665276064 2001 3.366848647963934 2002 4.698928162019669 2003 5.4874291358028415 2004 4.823737964616342 2005 6.076678823420863 2006 5.104213273029103 2007 5.776960147173497 2008 7.256763879788551 2009 1.842087422292991 2010 4.2297849990792855 2011 5.41240809007968 2012 3.7538787532365347 2013 2.346290098746053 2014 3.0530553080051277 2015 2.348496006859179 2016 2.5178459360124066 2017 3.3410421584153767 2018 3.6266473002725945 2019 1.2867004076623232 2020 0.8908252443129925 2021 3.713448366875525 2022 5.638377288097615 2023 4.596485061907686