Year	Number
1996	14.5161294937134
1998	20.8556156158447
2000	16.4893608093262
2002	8.46560859680176
2003	17.4603176116943
2004	23.645320892334
2005	24.8780479431152
2006	30.2439022064209
2007	29.6116504669189
2008	37.8640785217285
2009	42.5837326049805
2010	45.7142868041992
2011	43.6018943786621
2012	47.3933639526367
2013	47.3933639526367
2014	48.0769233703613
2015	36.1904754638672
2016	33.8095245361328
2017	32.8571434020996
2018	28.5714282989502
2019	26.1904754638672
2020	24.761905670166
2021	28.0952377319336
2022	30.1886787414551