Year annual % 1990 10.7158851533008 1991 12.5446382094389 1992 18.4890946304574 1993 10.7749092715904 1994 4.81598620107833 1995 6.30086155027618 1996 7.82303556124735 1997 7.2790929776352 1998 4.10785067628581 1999 8.88704742573556 2000 4.47243371871953 2001 3.41248658699003 2002 3.93485789816799 2003 3.07030496732148 2004 4.16642715074835 2005 6.11939040793636 2006 7.36003927902544 2007 7.60328894061151 2008 5.61985452382142 2009 15.9083302102455 2010 15.1469324490072 2011 26.3973066649675 2012 7.7411500296797 2013 7.08265099891379 2014 8.03536619587905 2015 4.40904543328786 2016 7.15033478751282 2017 8.26141254915089 2018 4.3558584680418 2019 4.69115593292496 2020 3.21740233241114 2021 6.7627121633127 2022 8.24119195323605 2023 5.41614518486134