Year	Number
1996	3.72340416908264
1998	1.06382977962494
2000	1.58730161190033
2002	9.5238094329834
2003	19.5979900360107
2004	16.5048542022705
2005	21.3592224121094
2006	28.019323348999
2007	24.1545886993408
2008	31.25
2009	32.7014236450195
2010	37.9146919250488
2011	34.5971565246582
2012	35.0710906982422
2013	35.0710906982422
2014	32.8571434020996
2015	28.0952377319336
2016	33.3333320617676
2017	30.4761905670166
2018	34.9056587219238
2019	31.6037731170654
2020	24.5283012390137
2021	21.2264156341553
2022	22.6415100097656