Year	Number
1996	31.7204303741455
1998	34.7593574523926
2000	36.7021293640137
2002	40.2116394042969
2003	34.9206352233887
2004	18.2266006469727
2005	23.9024391174316
2006	28.7804870605469
2007	23.3009700775146
2008	21.8446598052979
2009	26.3157901763916
2010	27.1428565979004
2011	23.222749710083
2012	22.748815536499
2013	28.9099521636963
2014	33.1730766296387
2015	32.3809509277344
2016	22.380952835083
2017	23.8095245361328
2018	27.1428565979004
2019	27.1428565979004
2020	29.0476188659668
2021	32.3809509277344
2022	33.9622650146484