Year annual % 1971 16.438320568404492 1972 9.451070055512204 1973 27.960132385468043 1974 182.03829907781335 1975 -1.5901745113848165 1976 21.635763005027613 1977 18.696656475070313 1978 0.7554747958509154 1979 28.581002035354146 1980 36.08562151696714 1981 9.131668718698393 1982 -5.8164078198209666 1983 -13.280527734234354 1984 -0.9518564582029256 1985 -6.2319278509962714 1986 -22.04079475784407 1987 7.737100930953787 1988 4.684054047917627 1989 1.153999262328398 1990 9.702748614226152 1991 -4.898740312282541 1992 -0.22576292199244108 1993 -5.1457525509430155 1994 1.6026993252937558 1995 7.767197731818371 1996 6.657557524969818 1997 -4.0789743188351935 1998 -18.382171482891266 1999 15.879468199213548 2000 32.654614909167776 2001 -4.951940971178331 2002 3.0090051745119695 2003 17.17646773840866 2004 13.106784845155858 2005 30.54269981303574 2006 8.361613535489298 2007 10.969860595314216 2008 22.89956468817236 2009 -24.21810087660687 2010 6.979329893911498 2011 18.27017134243667 2012 6.3299622355519745 2013 0.767488571935985 2014 -1.482751063093204 2015 -25.12980749599285 2016 -8.976699057518431 2017 7.78756965604812 2018 12.414403526000342 2019 -4.4559142053045235 2020 -15.100420315513617 2021 22.466022129473657 2022 25.880704628300194