Year annual % 1961 3.2717768389383366 1962 4.199577569613538 1963 3.3926984634500457 1964 4.642426558486875 1965 4.117855660964878 1966 4.920904610792107 1967 3.247762568008028 1968 4.236629235751906 1969 4.826782691316552 1970 6.865034924410679 1971 7.17883799190318 1972 7.1882518645740845 1973 10.620300797478734 1974 15.94511238907188 1975 14.512401859778265 1976 14.019695458172095 1977 11.417653507047461 1978 9.279404771967307 1979 10.070050601390236 1980 13.126499979221776 1981 11.633806430617582 1982 10.509972613903713 1983 8.190430708837624 1984 7.067528952536506 1985 5.453758556903438 1986 5.0551716344616295 1987 5.4405491149796035 1988 6.571206425558131 1989 6.1973879442466 1990 6.092179346705137 1991 7.914058799213855 1992 4.837156063898874 1993 4.856496705280044 1994 3.542425451797122 1995 4.563178841613805 1996 3.9316670143794497 1997 2.769905607821464 1998 2.8322696202358415 1999 2.055811756150568 2000 3.1738644985459104 2001 3.3890667362067006 2002 2.9367232700253396 2003 2.626799712818027 2004 2.9106920173294384 2005 2.7667274978417495 2006 2.842953830215798 2007 3.0220037484221365 2008 3.1362360261907725 2009 1.8078984296154488 2010 1.201369634422072 2011 1.8810654737251937 2012 1.8336644946775706 2013 1.662884215200208 2014 1.3613356559949565 2015 1.3237145324991175 2016 1.0423362497925055 2017 1.7764547871016774 2018 1.96194433504035 2019 2.2125799356316236 2020 1.9102683882393308 2021 2.9720759751698296 2022 6.462419862422706 2023 5.545215593492088