Year	Number
1996	21.1055278778076
1998	21.5
2000	26.3681583404541
2002	21.8905467987061
2003	25.3731346130371
2004	24.0384616851807
2005	21.0526313781738
2006	10.0478467941284
2007	12.4401912689209
2008	16.8269233703613
2009	22.274881362915
2010	23.222749710083
2011	15.4929580688477
2012	5.16431903839111
2013	0.938967108726501
2014	1.44230771064758
2015	0.952380955219269
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0