Year	Number
1999	0.016716518350393228
2000	0.01532632525558472
2001	0.019219501875154938
2002	0.02173195279139036
2003	0.03457994985033404
2004	0.03060809563062159
2005	0.021808904296780757
2006	0.016099041269522836
2007	0.009986370825701626
2008	0.016587268656336994
2009	0.04544262958175722
2010	0.04305265492529803
2011	0.03818652654196825
2012	0.034479811731360124
2013	0.028800162145829776
2014	0.02479562216045072
2015	0.023035898391111483
2016	0.027760159119526492
2017	0.024172507770710432
2018	0.02217184365239762
2019	0.02602058464016949
2020	0.0292382519161334
2021	0.06966874032058151
2022	0.07669026190615785
2023	0.07056733404173916