Year annual % 1961 11.876851078322218 1962 11.9226595664135 1963 8.696109235944775 1964 8.776784363461147 1965 12.136763975251057 1966 8.181145433605778 1967 8.909383331100145 1968 7.660126525528341 1969 6.037886541543983 1970 52.592094200501776 1971 20.51222355298509 1972 22.93059704917806 1973 24.17060245823899 1974 16.227941261781083 1975 -8.928590739580756 1976 17.8209781931578 1977 7.093357066494448 1978 -5.219654928282594 1979 11.919360874978054 1980 5.652510084628304 1981 1.9429290430428523 1982 -20.729880665898733 1983 -16.051401701080735 1984 -4.661468003465771 1985 -9.794489629605962 1986 17.012824739775297 1987 -6.632516640568454 1988 13.10930947290936 1989 -0.503060020480774 1990 15.193498019907196 1991 15.007902845806171 1992 3.9874802892719146 1993 -1.3637073702553124 1994 0.5587499163399343 1995 0.2120572119550701 1996 2.6374123531218316 1997 1.1037639323928659 1998 2.8933462351772903 1999 -3.76325345131697 2000 5.625413167475443 2001 -1.2107648042110242 2002 -2.819183548057296 2003 11.242068062414205 2004 7.958466319550411 2005 5.573833722455973 2006 2.7884059731149193 2007 1.8471349916952846 2008 6.249753356139465 2009 -2.0592639131652817 2010 5.039507571742391 2011 10.993761676487594 2012 5.40891607761418 2013 2.5347782713730282 2014 3.811422791426992 2015 4.509059063175698 2016 1.8844927356773695 2017 0.9110486555802737 2018 3.1992267802800853 2019 1.0977337495409216 2020 -3.5815348630766266 2021 5.075110349879793 2022 7.485984291341367 2023 -0.7549148105846655