Year annual % 1980 14.2713421163126 1981 11.8799135925283 1982 10.5278072972983 1983 11.5675243834069 1984 10.9838625715774 1985 7.7286389008592 1986 8.72972072702581 1987 8.2258064516129 1988 8.91047020013381 1989 8.84688691232552 1990 10.6535057862491 1991 12.641073023816 1992 9.96032320739721 1993 8.52787695688003 1994 12.0803818909762 1995 9.91121323211838 1996 8.920619877019874 1997 7.10616656859383 1998 8.256101795935455 1999 4.69170563048438 2000 4.01077836057766 2001 4.36152914007262 2002 3.75017465778466 2003 4.45540429025096 2004 4.504603316038985 2005 5.36452085832343 2006 6.07271879734293 2007 6.7467212176692 2008 11.4846669599236 2009 4.36234829325718 2010 4.763116275254495 2011 6.33279483849042 2012 5.83116601031462 2013 5.31623531326689 2014 4.789425090092156 2015 3.23658600886781 2016 3.205224345597455 2017 3.52025688811617 2018 4.0611633875107 2019 3.31925372703827 2020 4.92488537408932 2021 4.315279833868544 2022 7.93092925430087 2023 7.11475951738199