Year annual % 1961 2.55227305245495 1962 4.584353888556137 1963 -2.733075015993677 1964 0.7224156942280189 1965 2.1185732135168536 1966 -1.0898438152396608 1967 7.030570270289346 1968 1.3313074598791275 1969 0.2942217083889318 1970 -1.5942590726983497 1971 -0.294598742519824 1972 0.5933485648504728 1973 -1.2927828021830265 1974 6.299980300886503 1975 0.9797908145087888 1976 6.261618220463234 1977 -1.9260090850611533 1978 2.044067921744272 1979 1.0206122492513146 1980 -1.8641248659054241 1981 1.4634998813042301 1982 6.598062603954659 1983 -2.4436347654499997 1984 -4.57008343126914 1985 5.420509777869768 1986 4.948095391726497 1987 -2.9231444186842452 1988 3.0025674276016616 1989 -0.508371835133687 1990 -3.1732279441527567 1991 6.3481682941470865 1992 -2.205514144766994 1993 0.9219740416166502 1994 -1.2068200248774303 1995 3.0410404951730214 1996 8.214114979288809 1997 3.6227263863073347 1998 4.398136184689605 1999 4.299232006918146 2000 -1.1068508280879144 2001 3.4203728146196397 2002 1.1931569551422996 2003 4.507163310778452 2004 1.250803724152135 2005 5.29343297349088 2006 2.986692133663894 2007 1.0013026274653782 2008 2.7310856339255025 2009 -0.012474271014013993 2010 5.305144555242535 2011 3.5027065941213067 2012 3.273591495689004 2013 2.6572953305616664 2014 1.2639963853762453 2015 0.877785604827011 2016 2.893498326906794 2017 3.203256836128162 2018 3.693513327596733 2019 3.0644536044552666 2020 -0.6955339868094086 2021 4.14209565975429 2022 -0.7945198731775065 2023 0.4019578576131835