Year	Number
2004	0.276366174221039
2005	1.22305524349213
2006	1.15447616577148
2007	1.1724054813385
2008	1.3077244758606
2009	1.33094000816345
2010	1.2867397069931
2011	1.29547333717346
2012	1.05189907550812
2013	1.07990694046021
2014	0.489243447780609
2015	0.618334889411926
2016	0.640448570251465
2017	0.584569811820984
2018	0.560043096542358
2019	0.557111740112305
2020	0.539356708526611
2021	0.557350099086761
2022	0.578853130340576