Year	Number
1996	47.2361793518066
1998	49
2000	49.2537307739258
2002	49.7512435913086
2003	55.2238807678223
2004	57.211540222168
2005	56.4593315124512
2006	53.1100463867188
2007	53.5885162353516
2008	55.288459777832
2009	56.3981056213379
2010	54.9763031005859
2011	55.8685455322266
2012	54.4600944519043
2013	54.4600944519043
2014	54.8076934814453
2015	47.6190490722656
2016	40.476188659668
2017	41.4285697937012
2018	38.0952377319336
2019	40.476188659668
2020	37.6190490722656
2021	35.7142868041992
2022	36.7924537658691