Year Percent change 1992 3.869 1993 5.408 1994 5.737 1995 4.706 1996 2.631 1997 2.427 1998 2.018 1999 -0.577 2000 2.368 2001 1.424 2002 1.384 2003 1.793 2004 3.073 2005 3.483 2006 3.544 2007 8.168 2008 9.249 2009 2.166 2010 2.798 2011 7.62 2012 1.063 2013 1.063 2014 3.431 2015 -1.61 2016 2.407 2017 -0.843 2018 0.576 2019 1 2020 1.3 2021 1.5 2022 1.5 2023 1.5 2024 1.5