Year	Number
1996	17.021276473999
1998	12.2340421676636
2000	15.8730154037476
2002	10.582010269165
2003	4.02010059356689
2004	4.36893224716187
2005	6.31067943572998
2006	8.69565200805664
2007	9.17874431610107
2008	9.61538505554199
2009	9.00473976135254
2010	13.2701425552368
2011	19.4312801361084
2012	16.5876770019531
2013	18.0094795227051
2014	19.5238094329834
2015	21.4285717010498
2016	24.761905670166
2017	29.5238094329834
2018	28.7735843658447
2019	23.5849056243896
2020	34.9056587219238
2021	24.5283012390137
2022	36.3207550048828