Year annual % 1970 5.952804191520684 1971 1.9356294206618827 1972 1.5667807414860846 1973 3.7530737833070305 1974 2.389961010985104 1975 2.09197712608173 1976 4.698237907196614 1977 3.5064349391349623 1978 3.9676109272850795 1979 0.5793785685202835 1980 -0.8705483127130691 1981 -3.0530421198467224 1982 -1.8967570305312904 1983 0.8758248165638491 1984 0.2064828969048591 1985 0.917830511957078 1986 1.8013337106914378 1987 1.4306119753933757 1988 0.8972971922012221 1989 2.5385598063638213 1990 3.325518378520357 1991 1.9017078294486112 1992 -0.0430512863717496 1993 0.11081662556216543 1994 1.3382054257504308 1995 2.158694879801132 1996 4.443289273963714 1997 3.641303233366088 1998 4.967482745915447 1999 5.253914517846894 2000 2.9249644710138227 2001 1.2774951980214695 2002 0.5201458782324835 2003 -0.6005171821350359 2004 0.4104033982971913 2005 0.6745389961299963 2006 -0.31606686941640305 2007 1.6533085684559552 2008 0.49811733000863967 2009 -2.3886612966366556 2010 -0.4070805062833074 2011 -0.3961332141078202 2012 -1.5062557699341852 2013 -1.25565249083472 2014 0.014254395276495302 2015 1.5260492053531038 2016 0.5829255382314216 2017 1.529031691278874 2018 1.5694944606549086 2019 0.22314777467455826 2020 -6.879725403677895 2021 3.794545334867408 2022 5.5422345587223845 2023 -0.5896837857364119