Year	Number
2004-01-01	1.66835792944193
2005-01-01	1.72942017978698
2006-01-01	1.79364361694836
2007-01-01	1.85696492294821
2008-01-01	1.87314884163390
2009-01-01	1.84855019240716
2010-01-01	1.88820801767572
2011-01-01	1.86649401817956
2012-01-01	1.89135334433961
2013-01-01	2.03132145064539
2014-01-01	1.88325230307532