Year annual % 1961 -13.32828523332708 1962 -0.6402927036183286 1963 6.4394214269906485 1964 10.784847265845258 1965 10.781798472612422 1966 8.002273817502896 1967 -1.4205703862094055 1968 1.7736144812964199 1969 11.38451608756408 1970 13.441690494358397 1971 6.769539782461308 1972 4.901509093601959 1973 8.262255576365789 1974 3.8579905411784807 1975 6.826529431759809 1976 2.8256775525007214 1977 7.408095568815256 1978 9.20041748460767 1979 6.998598966415969 1980 7.494285488286906 1981 5.569416815220023 1982 6.407213966414886 1983 7.721396028874253 1984 9.93547281028664 1985 7.88803594570615 1986 7.122424521619024 1987 9.176543109590398 1988 9.737228442775532 1989 5.749517907089597 1990 5.151084431936084 1991 8.000828468903265 1992 11.177763784434731 1993 11.26275974381818 1994 10.934426063646228 1995 9.873558465573808 1996 9.062529922639456 1997 7.34187832183683 1998 2.8934156475157096 1999 6.377810294647901 2000 7.6456872376330125 2001 6.979258014961417 2002 8.059761894672988 2003 8.943951955183891 2004 9.120906744768817 2005 9.976506063068925 2006 11.077867480884635 2007 12.486155037955797 2008 8.615412673450209 2009 7.984368939692516 2010 9.921082013767645 2011 8.642897730956008 2012 7.58023773794099 2013 7.2984641508242305 2014 6.984349737115664 2015 6.707200955853594 2016 6.5645737102298085 2017 6.707405650272591 2018 6.524842607103935 2019 5.78182085585361 2020 1.2467818194838145 2021 7.6034196905682165 2022 3.4135655085497234 2023 5.068445549379263