Year annual % 1961 5.987346419290802 1962 4.4828586274664275 1963 8.688831518253266 1964 7.569757449057263 1965 10.419365822013134 1966 5.789951801434157 1967 5.400612597208294 1968 7.233220925002229 1969 5.507899634287483 1970 11.353461718188584 1971 0.46837254850393606 1972 0.8134064045836737 1973 7.0642638569401015 1974 3.540191712797352 1975 4.211415631474026 1976 5.156189589852019 1977 3.947698287414724 1978 8.048533619373856 1979 3.7584355685326187 1980 10.215704037270726 1981 7.920763571997739 1982 6.537486799985402 1983 6.778378338706403 1984 5.065205604758745 1985 7.592114698756063 1986 5.501653663860836 1987 6.452343024676438 1988 7.625278779589991 1989 4.959768894409365 1990 4.458586815098357 1991 5.06156775897955 1992 7.705897817160292 1993 1.7577476978467956 1994 3.7374155576774655 1995 4.962609146232808 1996 4.846581286816544 1997 1.014396010778924 1998 2.550234298173933 1999 3.660132739432356 2000 4.2600880111324955 2001 3.6513501708376452 2002 2.5948166844578395 2003 5.401310873143416 2004 7.831255569612509 2005 7.2765744364722025 2006 6.051637675699965 2007 4.444814339884402 2008 2.120441043308304 2009 3.472550595673482 2010 1.5017175215288319 2011 2.6801168542170473 2012 3.0275839108862925 2013 4.366865049783868 2014 4.116428171614217 2015 4.217942095725064 2016 6.573838285110426 2017 4.432625906839746 2018 6.151702610995187 2019 2.4976369294336536 2020 -1.2740874433870886 2021 6.5138857585270244 2022 4.767539530847003 2023 -0.004855269398987616