Year	Number
1996	33.5
1998	34.3283576965332
2000	28.8557205200195
2002	28.3582096099854
2003	34.825870513916
2004	33.6538467407227
2005	35.5769233703613
2006	37.019229888916
2007	36.538459777832
2008	35.0961532592773
2009	36.4928894042969
2010	35.5450248718262
2011	35.6807518005371
2012	37.0892028808594
2013	35.6807518005371
2014	34.4827575683594
2015	34.9753684997559
2016	32.019702911377
2017	34.4827575683594
2018	32.5242729187012
2019	33.3333320617676
2020	33.3333320617676
2021	30.917875289917
2022	31.4009666442871