Year	Number
1996	38.1909561157227
1998	44.5
2000	47.2636833190918
2002	50.2487564086914
2003	49.7512435913086
2004	47.5961532592773
2005	48.8038291931152
2006	47.3684196472168
2007	46.8899536132813
2008	39.4230766296387
2009	44.5497627258301
2010	45.0236968994141
2011	45.0704231262207
2012	46.0093879699707
2013	45.5399055480957
2014	50
2015	48.5714302062988
2016	42.3809509277344
2017	40.476188659668
2018	37.6190490722656
2019	38.0952377319336
2020	37.6190490722656
2021	31.9047622680664
2022	28.301887512207