Year	Number
1996	25.5
1998	16.4179096221924
2000	17.412935256958
2002	31.343282699585
2003	30.348258972168
2004	31.25
2005	25
2006	23.5576915740967
2007	25
2008	23.0769233703613
2009	26.5402851104736
2010	19.9052124023438
2011	13.1455402374268
2012	11.2676057815552
2013	12.2065725326538
2014	11.3300495147705
2015	11.822660446167
2016	10.837438583374
2017	11.3300495147705
2018	10.6796112060547
2019	10.1449279785156
2020	9.17874431610107
2021	8.69565200805664
2022	10.1449279785156