Year annual % 1991 96.3564961311478 1992 1472.2163557256 1993 1243.46165650541 1994 1546.72681598429 1995 160.888673519863 1996 38.8996311465469 1997 16.1357299796042 1998 5.66284472304086 1999 13.2801406207938 2000 17.4264026783762 2001 10.1564326382591 2002 5.80322409676619 2003 11.7385246474223 2004 16.1316269947904 2005 17.8748272505452 2006 21.5517089095579 2007 15.5270972952622 2008 20.9365382117877 2009 4.69108507403161 2010 19.5422853937296 2011 20.5429582655299 2012 4.78556981066754 2013 9.49908144359215 2014 5.77123952478276 2015 1.82354987628641 2016 13.6384336176426 2017 11.211105653729 2018 9.20560599766662 2019 7.63328623733945 2020 4.21085829258907 2021 13.9300750551614 2022 19.7690064802492 2023 9.34699630805164