Year	Number
1996	57.6086959838867
1998	54.347827911377
2000	58.152172088623
2002	63.2432441711426
2003	65.9459457397461
2004	63.6815910339355
2005	62.7450981140137
2006	64.2156829833984
2007	59.7087364196777
2008	61.6504859924316
2009	55.9808616638184
2010	54.5454559326172
2011	55.9241714477539
2012	54.502368927002
2013	54.028434753418
2014	49.519229888916
2015	48.5714302062988
2016	45.7142868041992
2017	45.238094329834
2018	38.5714302062988
2019	41.9047622680664
2020	40.476188659668
2021	36.1904754638672
2022	31.6037731170654