Year	Number
1996	31.6939888000488
1998	36.6120223999023
2000	37.7049179077148
2002	37.8378372192383
2003	32.972972869873
2004	37.8109436035156
2005	38.7254905700684
2006	41.4634132385254
2007	37.8640785217285
2008	26.2135925292969
2009	22.9665069580078
2010	25.3588523864746
2011	22.748815536499
2012	25.5924167633057
2013	23.222749710083
2014	22.5961532592773
2015	26.6666660308838
2016	26.6666660308838
2017	29.5238094329834
2018	27.1428565979004
2019	26.6666660308838
2020	32.3809509277344
2021	35.7142868041992
2022	29.2452831268311