Year	Number
1996	53
1998	47.7611923217773
2000	52.7363166809082
2002	48.2587051391602
2003	51.243782043457
2004	52.4038467407227
2005	51.9230766296387
2006	53.3653831481934
2007	54.8076934814453
2008	51.9230766296387
2009	52.1327018737793
2010	54.502368927002
2011	53.9906120300293
2012	53.521125793457
2013	52.582160949707
2014	49.7536964416504
2015	54.1871910095215
2016	55.1724128723145
2017	57.1428565979004
2018	57.7669906616211
2019	59.9033813476563
2020	58.4541053771973
2021	58.937198638916
2022	58.4541053771973