Year	Number
1996	12.2340421676636
1998	10.638298034668
2000	13.2275133132935
2002	7.93650770187378
2003	9.04522609710693
2004	10.6796112060547
2005	6.31067943572998
2006	13.5265703201294
2007	18.3574886322021
2008	20.1923084259033
2009	20.8530807495117
2010	17.0616111755371
2011	15.6398105621338
2012	19.4312801361084
2013	19.9052124023438
2014	42.3809509277344
2015	22.8571434020996
2016	21.4285717010498
2017	24.761905670166
2018	25.943395614624
2019	31.1320762634277
2020	36.3207550048828
2021	33.9622650146484
2022	36.3207550048828