Year	Number
1996	22.1105518341064
1998	23.5
2000	21.8905467987061
2002	42.7860679626465
2003	44.2786064147949
2004	42.788459777832
2005	38.2775115966797
2006	38.2775115966797
2007	36.3636360168457
2008	36.538459777832
2009	34.5971565246582
2010	34.5971565246582
2011	31.4553985595703
2012	34.7417831420898
2013	41.7840385437012
2014	33.6538467407227
2015	29.0476188659668
2016	30.4761905670166
2017	29.5238094329834
2018	32.3809509277344
2019	29.0476188659668
2020	31.9047622680664
2021	31.4285717010498
2022	32.5471687316895