Year	Number
1996	21.1956520080566
1998	22.8260860443115
2000	21.7391300201416
2002	33.5135116577148
2003	22.7027034759521
2004	21.8905467987061
2005	9.80392169952393
2006	17.6470584869385
2007	22.3300971984863
2008	28.6407775878906
2009	29.6650714874268
2010	33.0143547058105
2011	33.6492881774902
2012	29.3838863372803
2013	29.8578205108643
2014	25.480770111084
2015	23.8095245361328
2016	26.6666660308838
2017	27.1428565979004
2018	25.238094329834
2019	25.7142848968506
2020	21.9047622680664
2021	14.7619047164917
2022	16.5094337463379