Year	Number
1996	3.82513666152954
1998	3.82513666152954
2000	3.27868843078613
2002	4.86486482620239
2003	3.78378367424011
2004	9.45273590087891
2005	10.2941179275513
2006	18.536584854126
2007	23.3009700775146
2008	25.2427177429199
2009	21.0526313781738
2010	24.8803825378418
2011	22.748815536499
2012	25.5924167633057
2013	20.8530807495117
2014	23.0769233703613
2015	16.1904754638672
2016	14.7619047164917
2017	13.3333330154419
2018	16.1904754638672
2019	15.2380952835083
2020	17.1428565979004
2021	13.8095235824585
2022	12.2641506195068