Year	Number
2013	0.6235960305765916
2014	0.6084946263551606
2015	0.6780383061550502
2016	0.670073280916176
2017	0.5100836519389108
2018	0.38244824599813054
2019	0.3676652003703281
2020	0.31919089584140614
2021	0.387020951723311
2022	0.47832413731020945
2023	0.5229894080049455