Year annual % 1961 15.253993742283797 1962 -0.11496491833300126 1963 -2.6216106508966277 1964 -0.36203848314696074 1965 0.8697808034668952 1966 -1.5620708278184594 1967 0.8134972763034227 1968 1.363575748172181 1969 -3.79252871733334 1970 -2.614570450125413 1971 0.6659374023429478 1972 0.07418561621233266 1973 0.2084650193290969 1974 0.27773567086421735 1975 -1.1311751535884866 1976 -0.10628622787504582 1977 1.093771775671442 1978 1.6751424983773973 1979 3.600054771542432 1980 3.751777056666384 1981 2.357871421168099 1982 -0.14035508960765242 1983 1.156795262192972 1984 4.94416271275 1985 10.209399044134031 1986 4.669020797329964 1987 5.082516467654557 1988 12.10766149895612 1989 8.602465133721068 1990 5.711224168684396 1991 6.714536958482498 1992 8.190323021632167 1993 15.185864508950402 1994 20.616988811917707 1995 13.665696400196921 1996 6.506730635427772 1997 1.6165687420605934 1998 -0.9002516289440763 1999 -1.26305893875535 2000 2.062792613469867 2001 2.0470494572863345 2002 0.6020990782501059 2003 2.6031777190210335 2004 6.951992680864663 2005 3.9037442690798514 2006 3.926549396434126 2007 7.749686493038979 2008 7.795346036981911 2009 -0.2095333611806467 2010 6.881380253340552 2011 8.075684467040944 2012 2.3312175758119906 2013 2.1633700266545475 2014 1.0310636878039645 2015 -0.002944093649517754 2016 1.4073460273205143 2017 4.232681975223599 2018 3.4997476356719517 2019 1.2867004076623232 2020 0.49249391805741993 2021 4.552326578975709 2022 1.7857016421348249 2023 -0.5355697139484477