Year annual % 1975 14.2896742946894 1976 10.8137481327593 1977 11.1910016370359 1978 10.6602475929181 1979 11.7362306367885 1980 18.0354301616893 1981 14.25477987304875 1982 9.85211640458146 1983 10.541173715216651 1984 9.51625193285453 1985 10.67412001428295 1986 10.91838872710605 1987 9.27865613161588 1988 9.1593141335106 1989 11.3871321997957 1990 11.3963461199556 1991 14.55817595445005 1992 11.2144813801987 1993 14.470440986124501 1994 22.5650526933696 1995 13.4254143646407 1996 9.79968339016083 1997 7.14511160883929 1998 6.88054637817278 1999 5.18149279747878 2000 4.97896213183735 2001 6.27736020484006 2002 5.3012439026159 2003 5.12899499422417 2004 4.71037060105879 2005 4.69094870903769 2006 4.41589984169561 2007 5.84224874901387 2008 9.73228317146881 2009 2.936231535967 2010 3.91106195534028 2011 5.675333507320129 2012 3.78180754679678 2013 2.7764486140406 2014 3.180341214368855 2015 2.55468048901791 2016 2.120817133615875 2017 3.396975848952545 2018 3.04505397337071 2019 2.09604635327807 2020 1.9056635869553 2021 4.056815867462425 2022 8.48730869535043 2023 5.0341072621757