Year annual % 1966 1.0988035011417736 1967 8.836392076414398 1968 3.1090839975755955 1969 2.0427581159296864 1970 0.5209975362575392 1971 1.2902058845400575 1972 2.173599775829004 1973 0.6666992170573707 1974 7.962124274610275 1975 1.8604587120353244 1976 8.915292166405052 1977 -0.6053666303152454 1978 5.903655435491956 1979 3.94883035454896 1980 1.1370812013443015 1981 3.8574766154311817 1982 9.528691582761056 1983 0.2947947348051656 1984 -1.4626961680095008 1985 8.512821043629472 1986 8.065472194103563 1987 -0.34938911248994486 1988 5.648426561510817 1989 2.208994782344419 1990 -0.3775546513191017 1991 9.00981811284447 1992 0.16633448429242037 1993 3.219125522707728 1994 1.1951692565001366 1995 6.047824664464358 1996 11.757934900221727 1997 5.954022625366889 1998 7.295304545991385 1999 7.615624344612044 2000 1.6588817280021715 2001 6.361810964481535 2002 3.7914805290306504 2003 7.59397139009323 2004 4.790559501111716 2005 8.455906720722652 2006 7.015139796857326 2007 4.101843981849072 2008 5.707716264431625 2009 2.127298958265527 2010 6.534027116909115 2011 5.369014524811249 2012 8.084555996721193 2013 5.6805644687023715 2014 2.583581520965822 2015 3.6545743399032204 2016 5.974460941787044 2017 6.985560967004872 2018 7.2655963934156915 2019 4.3287139914702095 2020 2.9759259457748044 2021 5.62247047250159