Year	Number
1996	42.5
1998	41.7910461425781
2000	38.8059692382813
2002	35.8208961486816
2003	29.8507461547852
2004	23.0769233703613
2005	28.8461532592773
2006	28.8461532592773
2007	30.2884616851807
2008	49.038459777832
2009	55.9241714477539
2010	55.4502372741699
2011	54.9295768737793
2012	44.1314544677734
2013	43.1924896240234
2014	48.2758636474609
2015	40.8866996765137
2016	34.4827575683594
2017	33.9901466369629
2018	36.4077682495117
2019	39.613525390625
2020	44.9275360107422
2021	49.7584533691406
2022	50.2415466308594