Year annual % 1961 21.980798383021728 1962 5.985915492957746 1963 53.077975376196996 1964 38.84846163666539 1965 70.55902905479957 1966 21.665768194070083 1967 95.95019717311357 1968 54.98824167872648 1969 43.19687199089609 1970 18.395313295975548 1971 51.22326922249473 1972 68.07698217141166 1973 66.93526543878656 1974 66.65720196324992 1975 99.21627805091758 1976 99.14477703115455 1977 81.65644171779141 1978 91.4724755150287 1979 85.53783465142429 1980 73.1793710650976 1981 48.874433152017744 1982 49.76637585083416 1983 13.361400398847772 1984 71.97789071323082 1985 57.92600918097379 1986 93.52402352574278 1987 56.53845597608368 1988 82.02246597833647 1989 103.51173842363318 1990 116.36822858250402 1991 81.8529131007323 1992 50.50803306255682 1993 36.5107668257447 1994 42.184476267160974 1995 36.87905952717851 1996 34.10454410820213 1997 28.64852261678171 1998 26.648815627038662 1999 12.971722615882628 2000 9.544545078615437 2001 14.575297121666727 2002 25.926933790341494 2003 15.196074898001081 2004 -3.048625561273923 2005 0.02748634958305405 2006 11.631725794942248 2007 3.815311785958988 2008 28.565319569646018 2009 -2.6496929113076724 2010 22.14969076347192 2011 17.990901555269385 2012 9.954098523415942 2013 19.18948240504133 2014 19.336363209500703 2015 23.817568833515963 2016 3.9450891470267897 2017 1.910618755133735 2018 11.840189047784655 2019 15.93294531963677 2020 24.326484790732565 2021 16.817337622646043 2022 -1.716526625555901 2023 1.3380817256914974