Year	Number
1996	21.2765960693359
1998	30.319149017334
2000	33.862434387207
2002	28.0423278808594
2003	35.1758804321289
2004	15.5339803695679
2005	25.2427177429199
2006	17.8743953704834
2007	18.3574886322021
2008	20.1923084259033
2009	18.9573459625244
2010	25.5924167633057
2011	19.9052124023438
2012	20.3791465759277
2013	19.9052124023438
2014	24.761905670166
2015	16.1904754638672
2016	17.619047164917
2017	13.8095235824585
2018	13.2075471878052
2019	14.6226415634155
2020	14.6226415634155
2021	16.9811325073242
2022	19.3396224975586