Year annual % 1971 6.243014334678492 1972 5.46542058054132 1973 4.789641026570976 1974 2.8169643653806986 1975 3.521581599077578 1976 4.7292760824423965 1977 6.3890293396451625 1978 -1.6259191254389265 1979 4.925441440593687 1980 2.519805635775313 1981 1.0174528649190933 1982 1.8500266151426388 1983 5.604771361087373 1984 -2.1214411918291205 1985 1.7630895824025004 1986 2.1280416492990497 1987 2.3530155959954158 1988 2.263008452045085 1989 3.1225312485256893 1990 3.4435833154466025 1991 1.971783397852704 1992 2.3466942619755145 1993 -0.7161839974414903 1994 1.6510401641323824 1995 0.6981320256050054 1996 2.8000460024900633 1997 0.3063546029689945 1998 2.792421687498205 1999 2.2184629194436525 2000 2.868768525882089 2001 0.8939685207411969 2002 0.18785583167841935 2003 1.2484328475718627 2004 1.6880410850270948 2005 1.5542056814019247 2006 1.5884900311585 2007 0.7765308589404896 2008 0.6308094456915825 2009 0.5868160863833793 2010 0.7518983308395661 2011 1.004039875145324 2012 0.06464919868889751 2013 -0.6662072486357573 2014 -0.47718125783475784 2015 -0.6322338801741978 2016 0.45316207441443623 2017 1.2507984586021905 2018 0.6157218828616351 2019 0.1025484442096456 2020 -8.908025946158318 2021 3.7630124169367747 2022 4.657721472522454 2023 -1.2626146672138105