Year	Number
1996	32.7957000732422
1998	34.2245979309082
2000	36.7021293640137
2002	34.3915328979492
2003	33.862434387207
2004	27.5862064361572
2005	18.0487804412842
2006	16.5853652954102
2007	19.4174766540527
2008	15.5339803695679
2009	18.1818180084229
2010	16.1904754638672
2011	17.0616111755371
2012	21.8009471893311
2013	21.8009471893311
2014	17.3076915740967
2015	18.0952377319336
2016	12.8571424484253
2017	12.380952835083
2018	11.9047622680664
2019	12.380952835083
2020	16.1904754638672
2021	18.5714282989502
2022	18.8679237365723