Year annual % 1971 2.898387350292438 1972 2.898387368115692 1973 2.8983877386202153 1974 2.8983872828103614 1975 2.89838745502027 1976 -2.816747207323573 1977 -2.8167470446781095 1978 -2.816747475172278 1979 -2.8167471252458256 1980 -2.8167471084124713 1981 -2.8167471998676064 1982 -2.8167471331859275 1983 -2.81674716346501 1984 -2.816747169953402 1985 -2.816747184759464 1986 -2.8167469232288767 1987 -2.8167475005191847 1988 -2.8167470318128096 1989 -2.8167474152111254 1990 -2.8167469771023406 1991 -18.993755326006863 1992 -16.260311629606377 1993 -16.117387067107742 1994 -3.8661314312438293 1995 -7.92344513039113 1996 -11.859490783984057 1997 -8.9536553676121 1998 -11.788034826383267 1999 -6.568190314919121 2000 -6.856192949033897 2001 -6.7610189541646974 2002 -9.971356023789212 2003 0.2846740735861175 2004 -4.314837954363654 2005 -7.843137254902089 2006 -8.510638297872234 2007 -4.651162790697867 2008 75.60975609756125 2009 -5.555555555555642 2010 0 2011 14.705882352941174 2012 24.358974358974493 2013 4.123711340206128 2014 15.841584158416296 2015 3.41880341880281 2016 4.132231404959086 2017 -6.349206349206085 2018 -0.8474576271187289 2019 8.547008547008403 2020 1.5748031496055859 2021 7.751937984496919 2022 2.1582733812943786 2023 0.7042253521127435