Year	Number
1996	15.4255323410034
1998	29.7872333526611
2000	17.9894180297852
2002	20.1058197021484
2003	15.5778894424438
2004	17.9611644744873
2005	18.9320392608643
2006	21.7391300201416
2007	20.7729473114014
2008	17.3076915740967
2009	13.7440757751465
2010	16.5876770019531
2011	21.8009471893311
2012	19.4312801361084
2013	20.3791465759277
2014	27.1428565979004
2015	32.3809509277344
2016	38.0952377319336
2017	36.1904754638672
2018	37.2641525268555
2019	41.9811325073242
2020	34.4339637756348
2021	33.4905662536621
2022	27.8301887512207