Year	Number
1996	44.5
1998	48.756217956543
2000	51.7412948608398
2002	41.7910461425781
2003	44.2786064147949
2004	40.3846168518066
2005	38.461540222168
2006	51.9230766296387
2007	53.3653831481934
2008	51.9230766296387
2009	52.6066360473633
2010	51.6587677001953
2011	46.948356628418
2012	45.0704231262207
2013	46.948356628418
2014	49.7536964416504
2015	49.7536964416504
2016	53.2019691467285
2017	53.2019691467285
2018	47.5728149414063
2019	39.613525390625
2020	37.1980667114258
2021	34.2995185852051
2022	32.8502426147461