Year annual % 1965 3.5074626865671643 1966 -1.1535688536409516 1967 19.409190371991247 1968 3.127481522203897 1969 3.9862583664040754 1970 26.999316473000682 1971 22.5421600287047 1972 -1.991069467828124 1973 16.99156023601464 1974 17.98391215526047 1975 -3.84989989719171 1976 51.67562396240749 1977 26.950875630750964 1978 28.959428100468205 1979 8.06581377692665 1980 3.402644520641312 1981 30.246825944104167 1982 -5.098139973061142 1983 29.827468804095464 1984 2.9516960719882714 1985 21.85073564163787 1986 0.1344966199538581 1987 1.6927836607389894 1988 15.706653475142222 1989 18.91099225740805 1990 9.986912783047021 1991 18.001967892622364 1992 5.665949177380527 1993 5.952274836537907 1994 33.04366330312913 1995 -7.97072608242821 1996 18.74205523995449 1997 8.437903680116005 1998 -0.8459665913824412 1999 47.58567853473916 2000 15.544856463178938 2001 16.41187468567549 2002 30.185600705516315 2003 24.9985706014912 2004 10.227121969490446 2005 24.731430587837096 2006 22.661505520924816 2007 4.954486462275011 2008 33.637002369150004 2009 17.08356431016439 2010 24.97585643585115 2011 6.99889250832732 2012 16.069182532787327 2013 12.481705670441368 2014 12.195667225539063 2015 -0.06407793264030891 2016 7.296028489307471 2017 26.31712798346359 2018 19.87018584501674 2019 22.551138436943194 2020 24.10676939081593 2021 20.34124074975666 2022 37.160473848593355 2023 15.45211022162481