Year	Number
1996	30.8510646820068
1998	21.2765960693359
2000	11.640212059021
2002	10.582010269165
2003	18.5929641723633
2004	13.5922327041626
2005	12.1359224319458
2006	18.3574886322021
2007	14.9758453369141
2008	12.9807691574097
2009	14.2180099487305
2010	13.7440757751465
2011	19.4312801361084
2012	21.8009471893311
2013	24.1706161499023
2014	22.380952835083
2015	24.761905670166
2016	24.761905670166
2017	20.9523811340332
2018	20.2830181121826
2019	15.0943393707275
2020	13.2075471878052
2021	16.9811325073242
2022	16.5094337463379