Year	Number
1996	35.5
1998	19.9004974365234
2000	30.348258972168
2002	34.3283576965332
2003	40.2985076904297
2004	41.3461532592773
2005	41.3461532592773
2006	37.019229888916
2007	37.5
2008	39.9038467407227
2009	39.8104248046875
2010	36.4928894042969
2011	35.6807518005371
2012	34.7417831420898
2013	33.8028182983398
2014	30.5418720245361
2015	28.5714282989502
2016	23.645320892334
2017	22.660099029541
2018	18.9320392608643
2019	20.2898559570313
2020	20.2898559570313
2021	19.8067626953125
2022	17.8743953704834