Year annual % 1990 42.0950981322183 1991 72.5463845950386 1992 32.629184460634 1993 17.4149746297907 1994 16.9523160277603 1995 17.0401954191342 1996 8.69676711743546 1997 6.59740478176147 1998 8.83786412813899 1999 5.73470282940465 2000 3.40882766527606 2001 2.62226478436138 2002 4.69892816201967 2003 7.10960246291481 2004 8.43331213209085 2005 18.8105195707697 2006 8.56894797603766 2007 9.63022561216118 2008 22.6733161746106 2009 6.21562315120568 2010 12.0742957047761 2011 21.4136792818177 2012 9.07766069025038 2013 4.03852363752276 2014 3.69813796808818 2015 -1.71651170749655 2016 1.81953592779914 2017 4.36292014766431 2018 3.62664730027259 2019 2.42322694229267 2020 1.46747814810814 2021 2.88076792900642 2022 4.05124231712631 2023 1.90623130184002