Year annual % 1961 0.954490525087003 1962 2.015374611534341 1963 0.9153711084777711 1964 2.115426913166999 1965 1.5013314568520997 1966 2.7511976209561055 1967 2.0720271560513694 1968 1.5652695136578174 1969 0.706272590546142 1970 3.9103337359299104 1971 9.090662783953988 1972 2.0979360816292285 1973 9.190863229577431 1974 34.606550552296554 1975 5.454291225748243 1976 8.88889261239806 1977 11.255860813970969 1978 8.417213279000578 1979 19.27185581719604 1980 14.882020116728327 1981 9.909970030161674 1982 6.432121450707925 1983 10.730145660598822 1984 8.24745260848205 1985 4.054488148005902 1986 7.490749486475195 1987 9.894159357520579 1988 9.060963477006354 1989 15.824346036726233 1990 16.622449874924058 1991 11.99358111515916 1992 13.171745343996676 1993 8.429105388322682 1994 8.448871563887977 1995 10.679005567444506 1996 7.1076674485611875 1997 10.410509033443049 1998 2.377681489201791 1999 7.442196772685577 2000 9.700985969830029 2001 2.748200453706488 2002 3.165579066479424 2003 6.777493605962221 2004 11.446503789323103 2005 11.950448970805326 2006 10.649451546762819 2007 7.095515787762906 2008 15.950125977090295 2009 -0.45255878055276355 2010 10.106864629661857 2011 11.66297635176224 2012 5.981930503721827 2013 4.500270189790385 2014 2.4478441118455834 2015 2.6713437133122397 2016 1.1659452549003007 2017 4.825946494226393 2018 7.0447665382213245 2019 3.2621682072280507 2020 6.24605067140822 2021 10.400527240603267 2022 22.886075240776222 2023 4.183203449228586