Year	Number
1996	31.9148941040039
1998	41.4893608093262
2000	38.624340057373
2002	31.7460308074951
2003	36.1809043884277
2004	34.4660186767578
2005	35.9223289489746
2006	33.8164253234863
2007	32.8502426147461
2008	33.6538467407227
2009	27.014217376709
2010	30.3317527770996
2011	35.5450248718262
2012	37.9146919250488
2013	36.4928894042969
2014	32.3809509277344
2015	34.761905670166
2016	38.0952377319336
2017	33.8095245361328
2018	39.6226425170898
2019	40.0943412780762
2020	47.1698112487793
2021	46.698112487793
2022	49.5283012390137