Year	Number
1996	7.65027332305908
1998	7.10382509231567
2000	15.3005466461182
2002	8.10810852050781
2003	9.18918895721436
2004	7.96019887924194
2005	9.80392169952393
2006	10.2439022064209
2007	12.62135887146
2008	18.9320392608643
2009	31.5789470672607
2010	27.2727279663086
2011	27.488151550293
2012	19.9052124023438
2013	19.4312801361084
2014	26.4423084259033
2015	23.3333339691162
2016	28.5714282989502
2017	30
2018	31.4285717010498
2019	31.4285717010498
2020	29.5238094329834
2021	40.476188659668
2022	38.2075462341309