Year Percent change 1990 15.369 1991 -16.715 1992 -4.532 1993 1.317 1994 46.95 1995 3.451 1996 0.822 1997 2.115 1998 0.548 1999 -0.949 2000 1.795 2001 0.935 2002 0.421 2003 3.521 2004 -0.486 2005 1.115 2006 -0.673 2007 -0.195 2008 5.576 2009 0.866 2010 0.687 2011 2.302 2012 2.167 2013 3.263 2014 1.738 2015 -1.151 2016 4.071 2017 1.057 2018 6.253 2019 3 2020 2.5 2021 2.54 2022 2.54 2023 2.54 2024 2.54