Year	Number
1996	0.496299713850021
1998	0.330687075853348
2000	0.333465695381165
2002	0.251939505338669
2003	0.186523661017418
2004	0.274595320224762
2005	0.331786513328552
2006	0.481321036815643
2007	0.449754744768143
2008	0.450895994901657
2009	0.375795006752014
2010	0.349807351827621
2011	0.340737253427505
2012	0.378439128398895
2013	0.400293290615082
2014	0.552335262298584
2015	0.578454077243805
2016	0.582225859165192
2017	0.55032342672348
2018	0.466437667608261
2019	0.513285994529724
2020	0.557084858417511
2021	0.564386963844299
2022	0.561278462409973