Year Number 1992 785.8084930927301 1993 61.10847165452517 1994 4.770448125219897 1995 1.0178373433138235 1996 0.7807137342863287 1997 0.5985391999579065 1998 0.6493367808543365 1999 0.6739920050969134 2000 0.894607860064801 2001 0.8643754612802212 2002 0.857494435625133 2003 0.8047998802714517 2004 0.9785813944000105 2005 1.1930113270028293 2006 1.0891910573649517 2007 1.2181397405088719 2008 1.6443431881492216 2009 1.1196721637161127 2010 1.3072374244945921 2011 1.5655790430355299 2012 1.8623883828846475 2013 1.6755319440021073 2014 2.7025430378498956 2015 2.1871493369266424 2016 2.0585397943881425 2017 2.3121241981476843 2018 2.5431002537319527 2019 2.2536472283607516 2020 2.6286096228911404 2021 2.337044289687044 2022 2.464620030251251 2023 3.6598958649197173