Year	Number
2007	26.2135925292969
2008	28.1553401947021
2009	38.2775115966797
2010	34.4497604370117
2011	33.1753540039063
2012	36.4928894042969
2013	37.4407577514648
2014	33.1730766296387
2015	27.619047164917
2016	30.4761905670166
2017	31.9047622680664
2018	25.238094329834
2019	21.4285717010498
2020	25.7142848968506
2021	27.1428565979004
2022	21.698112487793