Year	Number
1996	37
1998	38.3084564208984
2000	19.4029846191406
2002	13.9303483963013
2003	12.93532371521
2004	10.5769233703613
2005	8.17307662963867
2006	7.692307472229
2007	8.17307662963867
2008	9.61538505554199
2009	10.4265403747559
2010	10.9004735946655
2011	8.45070457458496
2012	8.92018795013428
2013	10.7981224060059
2014	13.7931032180786
2015	13.3004922866821
2016	16.7487678527832
2017	15.7635469436646
2018	16.019416809082
2019	15.9420289993286
2020	14.9758453369141
2021	12.5603866577148
2022	9.66183567047119