Year annual % 1966 2.7511976209561055 1967 2.389602197133179 1968 2.754849219136844 1969 1.064824137169154 1970 3.9103337359299104 1971 7.357093553427795 1972 2.6838490586650323 1973 15.246408122543997 1974 34.606550552296554 1975 5.599144131896573 1976 8.6297822168616 1977 10.370077176244521 1978 6.464929990554765 1979 19.27185581719604 1980 24.158081473748155 1981 10.609536687547013 1982 6.372048661768133 1983 6.88749696084821 1984 6.180408568642179 1985 4.232081884726327 1986 2.964005550289748 1987 9.368089889921833 1988 4.17732529981258 1989 8.401589273554748 1990 9.702748614226152 1991 7.440999810337274 1992 5.716743758977685 1993 3.8631629175192117 1994 7.6024522522292415 1995 7.767197731818371 1996 6.657557524969818 1997 3.4597673790177197 1998 -3.1310886974195853 1999 8.44337746020058 2000 10.947919075559426 2001 1.8676998423894844 2002 4.17065591684414 2003 5.111829176275023 2004 10.991084622511039 2005 14.58525917317948 2006 9.096506323806437 2007 8.264113133770692 2008 15.950125977090295 2009 -2.7802230393940306 2010 11.103350581383935 2011 13.167219372619826 2012 4.661810781030539 2013 1.75215703553242 2014 1.0486746377290288 2015 -2.114936469844416 2016 0.9205895351131446 2017 4.962110219288107 2018 7.0447665382213245 2019 1.656253043440877 2020 1.2237390800426056 2021 11.654951323637349 2022 13.241537180713394 2023 -0.240072212350519