Year	Number
1996	15.0537633895874
1998	2.67379689216614
2000	5.31914901733398
2002	8.46560859680176
2003	15.3439149856567
2004	15.2709360122681
2005	18.0487804412842
2006	19.5121955871582
2007	17.9611644744873
2008	17.9611644744873
2009	21.0526313781738
2010	18.5714282989502
2011	19.4312801361084
2012	22.748815536499
2013	23.222749710083
2014	23.5576915740967
2015	21.9047622680664
2016	17.1428565979004
2017	19.0476188659668
2018	29.0476188659668
2019	34.761905670166
2020	45.238094329834
2021	48.0952377319336
2022	47.1698112487793