Year annual % 1960 -1.19069315346001 1961 -0.553335382726564 1962 2.05255023209693 1963 0.15145089937597 1964 -0.193563997036552 1965 -0.800000000003537 1966 0.684261974465291 1967 0.485436893448745 1968 1.92632850230086 1969 2.09728064471571 1970 2.34433934881409 1971 -0.453591880763753 1972 0.529703252323012 1973 13.7960339945019 1974 16.4948966890134 1975 13.1592443798582 1976 10.72499999925 1977 12.3245796860999 1978 8.28797624957705 1979 11.3433858811608 1980 10.8238432335411 1981 11.4330679503505 1982 0.307385561437016 1983 4.53867815133257 1984 3.4067501183779 1985 18.6867912971238 1986 36.9311212965017 1987 12.3232132755045 1988 10.8327037689913 1989 11.3871321997957 1990 41.2218671380974 1991 33.1664219167534 1992 10.0459179984089 1993 11.8196901746257 1994 10.8553211494391 1995 8.41141312270564 1996 11.0569165321987 1997 9.23290294884938 1998 6.61346070518056 1999 5.2136105860112 2000 5.9775773473714 2001 7.28587366610134 2002 8.13263054281055 2003 5.60347675434469 2004 7.5786224730973 2005 9.10864985719221 2006 6.56085282795383 2007 6.82161753590322 2008 11.3557611263151 2009 1.85910254733023 2010 3.8595090983317 2011 6.21412393067091 2012 3.78180754679678 2013 4.34337131279521 2014 3.4183616966296 2015 2.38872032839559 2016 4.44844199942819 2017 4.42453655182546 2018 3.75186186704508 2019 3.69998398008605 2020 3.21444062197345 2021 4.26105127422813 2022 6.88512823344287 2023 6.20657592272132