Year annual % 1960 3.38461538461553 1961 2.51132153100695 1962 0.168674698957635 1963 1.87635313921265 1964 2.18024399859687 1965 1.60221845610132 1966 0.52312357869953 1967 0.693868315713048 1968 2.03730057682276 1969 2.33428760186217 1970 3.71565884809263 1971 2.32381215838809 1972 3.37276106781155 1973 7.68928991786149 1974 7.25561627204007 1975 8.79166666616691 1976 0.551512830258583 1977 10.0403748002364 1978 4.70751124951487 1979 7.14710743797893 1980 15.747254103486 1981 11.5097558377123 1982 5.81823397218665 1983 -0.880997560317507 1984 -0.442500000750075 1985 -0.235207459677474 1986 2.02788871414761 1987 0.431725669422442 1988 0.938344387128515 1989 0.847691359226212 1990 2.9834058606356 1991 2.54219284786975 1992 1.63321209889045 1993 4.14481954180488 1994 4.12992181638259 1995 4.42664550286654 1996 2.05400000000009 1997 3.11207791953272 1998 2.38525135417661 1999 2.13476888806386 2000 2.36959287531806 2001 2.92949244324104 2002 2.18849048060549 2003 1.30383777442602 2004 2.79082848067754 2005 3.00796652450313 2006 2.77378006481472 2007 1.24921923797629 2008 4.25862171897073 2009 2.08432746082343 2010 1.51563513618532 2011 2.9629852819288 2012 2.37582057760386 2013 1.1802843636655 2014 0.310306472181665 2015 1.10054826378929 2016 0.642702771527304 2017 1.36435448150708 2018 1.15782362451517 2019 1.6420600176894 2020 0.638544956776712 2021 1.49789217934724 2022 6.15375621933037 2023 5.09396758978883