Year	Number
1996	11.1702127456665
1998	7.97872352600098
2000	13.7566137313843
2002	21.6931209564209
2003	25.6281414031982
2004	29.6116504669189
2005	25.7281551361084
2006	25.1207733154297
2007	24.6376819610596
2008	26.9230766296387
2009	25.1184825897217
2010	21.3270149230957
2011	25.5924167633057
2012	32.2274894714355
2013	31.7535552978516
2014	28.5714282989502
2015	29.5238094329834
2016	24.761905670166
2017	30
2018	29.2452831268311
2019	33.4905662536621
2020	25.943395614624
2021	25.943395614624
2022	25.4716987609863