Year	Number
1996	68.8442230224609
1998	69.5
2000	63.1840782165527
2002	67.164176940918
2003	69.651741027832
2004	67.788459777832
2005	55.5023918151855
2006	53.1100463867188
2007	53.5885162353516
2008	53.3653831481934
2009	54.028434753418
2010	50.7108993530273
2011	53.9906120300293
2012	51.1737098693848
2013	52.1126747131348
2014	54.3269233703613
2015	52.3809509277344
2016	54.2857131958008
2017	51.9047622680664
2018	51.9047622680664
2019	52.8571434020996
2020	53.3333320617676
2021	52.3809509277344
2022	54.7169799804688