Year annual % 1961 1.70085104266433 1962 4.2364946734332 1963 3.44066885043933 1964 2.41727169428962 1965 2.62739506314664 1966 0.885475776428606 1967 2.52709736414843 1968 2.12352674143938 1969 1.59656953543841 1970 2.4314432025797 1971 2.1564245272915 1972 1.91708548431841 1973 2.82139883125314 1974 3.16057585442932 1975 1.89611309962899 1976 1.25619719526045 1977 1.44371141988298 1978 1.81170641890994 1979 5.46545378423268 1980 2.6700809652344 1981 2.3482267682345 1982 1.55249627039205 1983 1.51940790612199 1984 0.982973566854865 1985 1.07425877163635 1986 1.24582698320867 1987 1.00675315207366 1988 0.840468540728853 1989 1.03591232011459 1990 0.321315033221987 1991 0.829228336445851 1992 0.839650031457883 1993 1.71777073417072 1994 2.25203043111788 1995 1.98013277729748 1996 4.43860779481101 1997 0.832512854813318 1998 0.834808807338866 1999 0.955125814331738 2000 0.881594075853745 2001 0.736962668138432 2002 0.44284682728195 2003 -0.197404126472125 2004 0.77991856230718 2005 0.436871406105885 2006 0.642270482876128 2007 0.859633272217027 2008 0.598238786949717 2009 0.215353334344996 2010 0.734446396338105 2011 0.672543291818633 2012 1.1039579972368 2013 0.401982535858444 2014 0.702370950536049 2015 0.851197911086988 2016 0.619366345332479 2017 0.768513877614955 2018 0.800230596967774 2019 0.739283471323064 2020 -0.358932661902885 2021 -0.91177674914823 2022 -0.907914524343304 2023 2.55352466697343