Year	Number
2007	3.39805817604065
2008	3.88349509239197
2009	1.91387557983398
2010	2.39234447479248
2011	1.42180097103119
2012	0.473933637142181
2013	0.473933637142181
2014	1.44230771064758
2015	20
2016	21.9047622680664
2017	20.9523811340332
2018	36.1904754638672
2019	23.8095245361328
2020	28.0952377319336
2021	25.7142848968506
2022	31.6037731170654