Year annual % 1961 1.7898133047037135 1962 0.9920448411221656 1963 2.8244951493035586 1964 5.23310897142926 1965 -2.8289851198943694 1966 -1.0262406677430675 1967 3.738653809982466 1968 2.228693630533016 1969 3.3586542719564534 1970 3.512891972332085 1971 -1.5314673180109537 1972 -3.8815365552464414 1973 1.4960181661170822 1974 0.12255367609338919 1975 4.4427116285632735 1976 0.30055333771754533 1977 3.8266518594798526 1978 3.7285282033296028 1979 -4.749915733082133 1980 4.055482254285053 1981 4.005674959113506 1982 1.465237916982403 1983 4.153927187798416 1984 1.7980036534742254 1985 3.0111631223310553 1986 2.4175608320978483 1987 1.9027229875242995 1988 5.921204855484646 1989 3.008933543074548 1990 3.0730000972551466 1991 -0.09527121369126235 1992 3.5075560930041263 1993 1.9947557687986546 1994 3.625255248015364 1995 4.58135894770102 1996 4.529530364559648 1997 1.61438782735857 1998 3.3530670055936582 1999 5.406978204697069 2000 2.109251855731273 2001 2.3677781710309347 2002 1.752066282692482 2003 5.212397152562232 2004 5.679384066479969 2005 5.828042862037506 2006 5.9258624713013575 2007 5.550958397207765 2008 1.8085972423651242 2009 5.4007880738494265 2010 5.805525994533838 2011 3.552625759974589 2012 3.9129311787175425 2013 4.602006640733691 2014 5.486592969003226 2015 5.951958507857441 2016 6.485163906311612 2017 5.222753616159494 2018 5.08663023673472 2019 2.7483949097324682 2020 -5.643700858473764 2021 7.655545540323814 2022 5.346414023596438 2023 5.299419163684945