Year	Number
1996	28.7234039306641
1998	22.8723411560059
2000	31.7460308074951
2002	14.2857141494751
2003	23.1155776977539
2004	16.019416809082
2005	31.5533981323242
2006	31.4009666442871
2007	34.7826080322266
2008	29.3269233703613
2009	24.1706161499023
2010	28.9099521636963
2011	39.3364944458008
2012	37.9146919250488
2013	36.4928894042969
2014	34.761905670166
2015	35.238094329834
2016	40.9523811340332
2017	39.0476188659668
2018	35.3773574829102
2019	27.8301887512207
2020	31.1320762634277
2021	33.0188674926758
2022	31.6037731170654