Year annual % 1961 2.985072196619626 1962 3.665817019620917 1963 2.549340364009282 1964 2.886929350251677 1965 2.6500390708464465 1966 2.3538327214801598 1967 4.896144257168643 1968 6.082036402751356 1969 3.4666656275233976 1970 4.123711657969608 1971 5.4455441862042875 1972 4.577464949856008 1973 4.040404388421564 1974 6.634303959018695 1975 7.384928372044229 1976 2.9674989785466863 1977 4.30008965159756 1978 5.35087861328951 1979 5.8284765671368035 1980 8.615262734892255 1981 9.272003770824043 1982 6.728537209830037 1983 5.5279511302396 1984 4.708652027430276 1985 2.698144330307727 1986 3.3345682651736865 1987 3.207969423890475 1988 3.7156120281461256 1989 2.2942137121924304 1990 11.851238619617078 1991 3.123297481651548 1992 2.576380333657525 1993 1.8863908048568874 1994 3.1782645443523876 1995 2.7741824375375757 1996 3.9115527761345987 1997 1.332250230710173 1998 6.360142576402339 1999 1.472777763543533 2000 3.295071907260734 2001 5.5049110244885355 2002 2.549778242521313 2003 4.417472883868129 2004 -1.2921780498036384 2005 6.590122533400901 2006 5.492863842299414 2007 3.782483976531111 2008 6.561857839787393 2009 4.9825555853530545 2010 2.494098591309907 2011 2.3698263491592115 2012 1.179228149062837 2013 1.182015195750182 2014 1.200554859381569 2015 1.9775444701880502 2016 2.221582484334064 2017 2.091402162422227 2018 2.0461156854381386 2019 2.412852256961756 2020 2.382283456423778 2021 2.799639904752354 2022 3.033079021757956 2023 3.23545943820875