Year	Number
1996	8.51063823699951
1998	6.91489362716675
2000	8.99470901489258
2002	17.4603176116943
2003	29.1457290649414
2004	26.2135925292969
2005	33.980583190918
2006	42.0289840698242
2007	37.1980667114258
2008	47.1153831481934
2009	47.3933639526367
2010	51.6587677001953
2011	48.8151664733887
2012	43.6018943786621
2013	45.497631072998
2014	45.7142868041992
2015	40.476188659668
2016	48.0952377319336
2017	45.238094329834
2018	46.2264137268066
2019	46.698112487793
2020	39.1509437561035
2021	33.4905662536621
2022	36.3207550048828