Year annual % 1963 5.978260869565218 1964 16.153846153846153 1965 20.309050772626932 1966 8.073394495412845 1967 18.33616298811545 1968 22.85509325681492 1969 34.193623730001164 1970 10.347228265599165 1971 11.293375394321767 1972 -1.5093537414965985 1973 14.497445859414345 1974 91.45406560261405 1975 -7.187869239858212 1976 45.73520050922979 1977 16.663026861760212 1978 35.08049419692999 1979 2.4498029070719443 1980 9.070414067838017 1981 38.58343668115231 1982 16.506910609650053 1983 0.5035375648763117 1984 15.553536400291957 1985 5.2336544750398675 1986 15.56416673882742 1987 -1.0098708958132536 1988 -11.90969341691527 1989 1.1213024599218047 1990 9.531843740041872 1991 3.1420353907554586 1992 -18.002944411048034 1993 -16.18726697046813 1994 44.289715229397316 1995 22.274252688218088 1996 -6.349704254798636 1997 5.262328465624747 1998 0.06526477655949067 1999 8.379785983919632 2000 15.368373665795174 2001 -9.06390585394999 2002 -2.6846835032559393 2003 13.265710690901425 2004 18.676337736318327 2005 2.6028696939575626 2006 23.88084918869643 2007 10.604438641670122 2008 24.881945024573525 2009 14.402481472510189 2010 14.736782900373207 2011 17.272632821589504 2012 10.129372082665203 2013 16.942641130944445 2014 3.6222938781525604 2015 20.778547564293547 2016 12.3877282908383 2017 9.95699570871958 2018 9.334947497764153 2019 4.531678582104924 2020 11.585092886414289 2021 12.279776076589762 2022 15.362465584979212 2023 6.660686962124336