Year	Number
1996	29.5698928833008
1998	35.8288764953613
2000	32.4468078613281
2002	25.3968257904053
2003	29.6296291351318
2004	29.0640392303467
2005	34.1463432312012
2006	37.5609741210938
2007	31.5533981323242
2008	33.980583190918
2009	28.2296657562256
2010	28.0952377319336
2011	23.222749710083
2012	27.488151550293
2013	26.5402851104736
2014	29.8076915740967
2015	30.9523811340332
2016	33.8095245361328
2017	39.0476188659668
2018	39.523811340332
2019	33.8095245361328
2020	32.8571434020996
2021	31.9047622680664
2022	32.5471687316895