Year Percent change 1991 5.343 1992 9.27 1993 -1.62 1994 3.005 1995 4.115 1996 3.196 1997 4.216 1998 3.291 1999 3.366 2000 3.497 2001 2.393 2002 6.68 2003 3.477 2004 6.632 2005 4.67 2006 3.948 2007 3.646 2008 2.65 2009 0.296 2010 6.039 2011 5.091 2012 5.062 2013 5.615 2014 6.352 2015 6.086 2016 0.642 2017 -0.948 2018 -0.087 2019 1.38 2020 2.027 2021 3.112 2022 3.288 2023 3.264 2024 3.302