Year annual % 1987 5.75646401118136 1988 7.19696969696955 1989 6.18935403382355 1990 7.60609957743892 1991 6.90489632742757 1992 5.82434514637906 1993 10.6765371840708 1994 11.4431196444973 1995 8.01292443952661 1996 7.226914895324105 1997 5.87983105743515 1998 5.4415255401998355 1999 3.38800754204006 2000 4.1028098304232845 2001 4.64604442058634 2002 2.80115505180747 2003 3.23464817293927 2004 3.85730391367397 2005 4.14297583631023 2006 4.3655220300907 2007 5.438758838765565 2008 8.95598705177784 2009 3.04166827698483 2010 3.2977796133984647 2011 4.3707355993922 2012 3.31605566687647 2013 2.68229684085039 2014 2.04461481539333 2015 1.5579071134626 2016 1.10920805807027 2017 2.177275726892625 2018 2.474463471184345 2019 2.1617625813305352 2020 1.94031996607184 2021 3.45934352504318 2022 8.64091108973855 2023 6.3867811104059395