Year annual % 1990 50.4592630804603 1991 58.2483558654785 1992 5.56829005918074 1993 4.98376306166659 1994 10.1358756655482 1995 9.65238600151766 1996 3.66973684319389 1997 9.45133281239818 1998 6.50470125160993 1999 3.83415440241939 2000 7.20776279717097 2001 6.04073883566554 2002 6.92066884933828 2003 33.4615406633308 2004 45.166310045594 2005 5.78125184255491 2006 6.64124477285613 2007 5.70085725461085 2008 10.3916875139185 2009 3.49814656597557 2010 5.44341331542486 2011 8.06075517514766 2012 5.09818154500647 2013 4.69281914231266 2014 4.32128893767675 2015 2.47188597709767 2016 1.99367846452935 2017 4.18137503365021 2018 4.12148968696981 2019 2.52561865647056 2020 4.72350401957794 2021 7.77715811136834 2022 10.7141556508469 2023 6.42391980187598