Year % 1990 23.7069419387022 1991 29.2153431726864 1992 23.4507372301448 1993 15.0360138334626 1994 19.5115898360747 1995 24.766783625362 1996 20.6304228526556 1997 17.6554636727792 1998 15.4086975951107 1999 12.6490123712999 2000 9.19147845966661 2001 8.98439099141686 2002 7.32027178649307 2003 7.07781802082702 2004 10.5038434728745 2005 6.410233288939 2006 6.03297147973723 2007 7.23034791245983 2008 8.05633658185826 2009 8.13944215849008 2010 4.92640922063634 2011 5.49011402948333 2012 6.27392469593333 2013 3.770748274375 2014 1.77746258516667 2015 1.1125032961 2016 0.580953226616667 2017 0.120096355691667 2018 0.0643224296 2019 0.104764135675 2020 0.467145774525 2021 1.0140479751 2022 8.36367683543333 2023 13.1175731006917