Year annual % 1962 0.8847292801520856 1963 26.323609349519838 1964 19.254711839123324 1965 -8.277404921700224 1966 6.561762391817466 1967 5.480901752313447 1968 9.972234536503418 1969 17.170559904949823 1970 18.170789121066164 1971 18.988369776742616 1972 22.296627303516928 1973 13.39833837017069 1974 38.724684514026244 1975 27.204573142161 1976 1.5765433917784 1977 18.641986820837996 1978 7.337009916294424 1979 20.749328777154016 1980 12.267456354901524 1981 5.296498909191301 1982 7.923018390431162 1983 13.366605930972565 1984 11.202446728223094 1985 1.884369743674605 1986 17.36955614446635 1987 4.243083509376719 1988 20.42261449660144 1989 8.719149476516137 1990 25.69391857029543 1991 14.545692188613662 1992 14.573055603595058 1993 6.335485206230445 1994 2.540933646407344 1995 4.491186958082303 1996 0.86155560776001 1997 -8.730865896066472 1998 -0.5360557984679457 1999 13.641733692928232 2000 -1.5458051339133356 2001 11.511171225749429 2002 21.067676412405582 2003 16.2834942768808 2004 9.462267266012613 2005 15.167709088950662 2006 22.267700562721114 2007 8.28845997808064 2008 -6.46703047654737 2009 7.081819160004957 2010 3.506392399388648 2011 11.047571065120318 2012 6.289298568376296 2013 18.985957829013238 2014 10.395385761307637 2015 13.935641479714663 2016 5.3448445113264516 2017 8.076881046065985 2018 2.4600166735855735 2019 3.178486669348344 2020 0.9859353157327676 2021 11.421170434053462 2022 5.080672117570373 2023 8.756736845033824