Year annual % 1961 5.553004243461842 1962 5.552390982794774 1963 5.530151781836661 1964 5.36890007578296 1965 5.197269745262865 1966 5.185993773062111 1967 5.162464917543937 1968 5.149397476657571 1969 5.122311957313127 1970 5.119581280817066 1971 5.079580325807533 1972 5.0615670713615355 1973 5.075905198688751 1974 4.978824801284816 1975 4.305717805140417 1976 3.439917285491961 1977 3.6054608168394315 1978 8.085129094318813 1979 13.373607682412525 1980 9.521544360493714 1981 1.681726452322197 1982 1.2376944768317324 1983 4.106191863247361 1984 4.571528799288634 1985 4.9670122164127 1986 5.04958872032623 1987 4.579025966839675 1988 1.221908788811627 1989 -0.5852273331864632 1990 0.6564544325658984 1991 -2.7105661976009774 1992 -3.4629061938210755 1993 4.104811074411688 1994 6.1474692349213536 1995 4.690076142095701 1996 4.701551225705135 1997 4.57686511309739 1998 5.211653216326613 1999 5.108350788363601 2000 5.056560664550975 2001 5.0334901059715556 2002 4.787004905896744 2003 5.851187988338736 2004 5.81892739745874 2005 5.571826035576347 2006 5.1394781616213265 2007 -4.502431933667732 2008 7.461957819523067 2009 6.898685411363006 2010 6.82510726297554 2011 5.778317920835962 2012 3.164628167390747 2013 4.595522095935864 2014 4.817646207323878 2015 4.676617337014719 2016 5.082702200641638 2017 5.22354690201429 2018 4.911172118119945 2019 4.921220361994924 2020 4.698557757618971 2021 4.41681805674587 2022 4.330359821367875 2023 4.306360434546386