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Recent study looking into organised team sport suggests they need to evolve. Participation rates peak by age 11 but fall thereafter. Of interest is that Rugby barely makes the top 20 activities..
http://www.abc.net.au/news/2016-12-08/$10b-sport-industry-struggling-to-keep-kids-involved/8102246
http://static.ausport.gov.au/ausplay/?page=14