Year	Number
1996	8.15217399597168
1998	4.89130449295044
2000	3.80434775352478
2002	3.78378367424011
2003	2.16216206550598
2004	2.48756217956543
2005	1.96078431606293
2006	1.47058820724487
2007	2.42718458175659
2008	2.42718458175659
2009	2.39234447479248
2010	1.91387557983398
2011	1.89573454856873
2012	1.42180097103119
2013	1.42180097103119
2014	0.480769217014313
2015	0.952380955219269
2016	1.42857146263123
2017	1.90476191043854
2018	2.85714292526245
2019	2.38095235824585
2020	1.90476191043854
2021	1.90476191043854
2022	1.88679242134094