Year	Number
1996	62.3115577697754
1998	60
2000	51.7412948608398
2002	38.3084564208984
2003	38.8059692382813
2004	36.538459777832
2005	44.0191383361816
2006	44.4976081848145
2007	44.4976081848145
2008	39.4230766296387
2009	41.2322273254395
2010	43.1279602050781
2011	44.6009407043457
2012	42.7230033874512
2013	41.7840385437012
2014	31.730770111084
2015	36.6666679382324
2016	51.9047622680664
2017	53.8095245361328
2018	54.2857131958008
2019	48.0952377319336
2020	44.761905670166
2021	45.7142868041992
2022	44.3396224975586