Year	Number
1996	32.1608047485352
1998	34.5
2000	29.3532333374023
2002	34.3283576965332
2003	30.348258972168
2004	35.5769233703613
2005	36.8421058654785
2006	27.2727279663086
2007	29.6650714874268
2008	26.4423084259033
2009	30.8056869506836
2010	31.2796211242676
2011	29.577465057373
2012	20.1877937316895
2013	17.8403759002686
2014	28.8461532592773
2015	28.5714282989502
2016	18.5714282989502
2017	21.4285717010498
2018	20.9523811340332
2019	22.8571434020996
2020	23.8095245361328
2021	22.380952835083
2022	23.5849056243896