Year	Number
1996	6.91489362716675
1998	10.1063833236694
2000	19.5767192840576
2002	26.9841270446777
2003	33.668342590332
2004	39.3203887939453
2005	44.6601943969727
2006	42.0289840698242
2007	54.5893707275391
2008	56.730770111084
2009	60.6635055541992
2010	33.1753540039063
2011	5.21327018737793
2012	3.79146909713745
2013	1.89573454856873
2014	0.476190477609634
2015	0.952380955219269
2016	0.952380955219269
2017	0.476190477609634
2018	0
2019	0
2020	0
2021	0
2022	0