Year	Number
1996	28.4153003692627
1998	24.0437164306641
2000	31.1475410461426
2002	27.5675678253174
2003	31.8918914794922
2004	30.8457717895508
2005	33.8235282897949
2006	28.2926826477051
2007	25.2427177429199
2008	28.1553401947021
2009	20.0956935882568
2010	21.0526313781738
2011	22.748815536499
2012	27.014217376709
2013	26.5402851104736
2014	17.3076915740967
2015	25.7142848968506
2016	20
2017	21.4285717010498
2018	20.4761905670166
2019	16.6666660308838
2020	19.5238094329834
2021	27.1428565979004
2022	26.4150943756104