Year annual % growth 1961 74.31839887842273 1962 -1.5626025860671433 1963 -7.936333744941663 1964 8.374494677677717 1965 11.363353383603652 1966 3.2656158230070673 1967 3.7547822950647856 1968 11.047533820164318 1969 3.602028539783106 1970 -5.960180079655956 1971 -19.89433532631682 1972 -1.3187187343514637 1973 4.454236565847822 1974 5.970214572266201 1975 17.505063397646865 1976 -23.287712038922606 1977 5.357300197249003 1978 10.593292591399049 1979 8.428844278550855 1980 -32.384030223930424 1981 -22.652762077492255 1982 -4.285545662304713 1983 -4.4384596772152065 1984 33.58287479297459 1985 0.7877075806578091 1986 -3.31107327350864 1987 3.9285811116354097 1988 -5.253942588143275 1989 39.17773621659947 1990 -9.059312709259132 1991 2.1530925479642775 1992 0.5146311827543286 1993 5.433524555886194 1994 10.047301942947982 1995 3.4675540300863332 1996 4.18272510996816 1997 -3.7082967546496377 1998 -4.442631495579548 1999 15.482831599743491 2000 13.393469186415615 2001 9.606948959893884 2002 -45.87220829537012 2003 39.04864789331404 2004 9.785855670534133 2005 1.832214782301918 2006 17.341931656477456 2007 30.596875849249784 2008 12.615595814833355 2009 -24.593476293961217 2010 5.684991512755744 2011 6.445666048519129 2012 -4.961504853349709 2013 10.582381883845486 2014 39.35543708530557 2015 -0.6419081743488846 2016 -0.9801216569325959 2017 45.39597084907851 2018 2.449297778793607 2019 10.912190997971322 2020 -36.63572706812827 2021 55.00684883393291 2022 27.452920000502672 2023 3.3520198948467907