Year	Number
1996	57.5268821716309
1998	43.8502655029297
2000	45.7446823120117
2002	51.8518524169922
2003	41.798942565918
2004	46.305419921875
2005	41.9512176513672
2006	39.0243911743164
2007	36.8932037353516
2008	37.8640785217285
2009	36.3636360168457
2010	31.9047622680664
2011	33.6492881774902
2012	30.8056869506836
2013	28.9099521636963
2014	31.25
2015	30.4761905670166
2016	32.8571434020996
2017	33.8095245361328
2018	29.5238094329834
2019	30.4761905670166
2020	33.3333320617676
2021	45.238094329834
2022	49.5283012390137