Year annual % 1990 25.1171058836009 1991 53.1313504526141 1992 60.0357338849959 1993 52.806399666526 1994 31.1072465288465 1995 25.1868524028902 1996 18.8721078285238 1997 9.6086992002076 1998 8.33305644989014 1999 6.91606081241565 2000 10.5870802513251 2001 7.80736940095173 2002 9.08384842898865 2003 11.6240551108509 2004 12.8585995341944 2005 11.4687438682087 2006 8.84819293265961 2007 11.3208103797352 2008 13.54680952549 2009 11.6565049802064 2010 9.81023516820396 2011 5.79618847204975 2012 6.57190361388207 2013 8.41581565660749 2014 6.92994589148002 2015 6.65540782392959 2016 4.66411175576692 2017 6.54982735214614 2018 4.99324114976486 2019 3.18250309465809 2020 3.46419204457331 2021 7.42596071661401 2022 12.7978003814515 2023 11.6865531931957